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John 6:63

“The Hard Saying and Division”John 6:60–66
King James Version
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.

Bible text: King James Version (1769 Blayney text) · Public domain

KJV (with Strong's)
It is G2076 the spirit G4151 that quickeneth G2227; the flesh G4561 G3756 profiteth G5623 nothing G3762: the words G4487 that G3739 I G1473 speak G2980 unto you G5213, they are G2076 spirit G4151, and G2532 they are G2076 life G2222.

Bible text: King James Version with Strong's numbers · Public domain

Berean Standard Bible
The Spirit gives life; the flesh profits nothing. The words I have spoken to you are spirit and they are life.

Bible text: Berean Standard Bible · Public domain

American Standard Version
It is the spirit that giveth life; the flesh profiteth nothing: the words that I have spoken unto you are spirit, and are life.

Bible text: American Standard Version (1901) · Public domain

World English Bible Messianic
It is the spirit who gives life. The flesh profits nothing. The words that I speak to you are spirit, and are life.

Bible text: World English Bible, Messianic edition · Public domain

Geneva Bible (1599)
It is the spirite that quickeneth: the flesh profiteth nothing: the woordes that I speake vnto you, are spirite and life.

Bible text: Geneva Bible (1599) · Public domain

Young's Literal Translation
the spirit it is that is giving life; the flesh doth not profit anything; the sayings that I speak to you are spirit, and they are life;

Bible text: Young's Literal Translation · Public domain

King James Version — Interlinear
21 Greek words
  1. τὸtoTheG3588T-NSNDefinite article Nominative Singular Neuter
  2. πνεῦμάpneumaSpiritG4151N-NSNNoun Nominative Singular Neuter
  3. ἐστινestinisG1510V-PAI-3SVerb Present Active Indicative 3rd Singular
  4. τὸtothe [one]G3588T-NSNDefinite article Nominative Singular Neuter
  5. ζῳοποιοῦνzōopoioungiving lifeG2227V-PAP-NSNVerb Present Active Participle Nominative Singular Neuter
  6. ἡhētheG3588T-NSFDefinite article Nominative Singular Feminine
  7. σὰρξsarxfleshG4561N-NSFNoun Nominative Singular Feminine
  8. οὐκouknotG3756PRT-NNegative Particle Negative
  9. ὠφελεῖōpheleiprofitsG5623V-PAI-3SVerb Present Active Indicative 3rd Singular
  10. οὐδέν·oudenno [thing]G3762A-ASNAdjective Accusative Singular Neuter
  11. τὰtaTheG3588T-NPNDefinite article Nominative Plural Neuter
  12. ῥήματαrhēmatadeclarationsG4487N-NPNNoun Nominative Plural Neuter
  13. ἃhathatG3739R-APNRelative pronoun Accusative Plural Neuter
  14. ἐγὼegōI myselfG1473P-1NSPersonal pronoun Nominative 1st Singular
  15. λελάληκαlelalēkahave spokenG2980V-RAI-1SVerb Perfect Active Indicative 1st Singular
  16. ὑμῖνhuminto youG4771P-2DPPersonal pronoun Dative 2nd Plural
  17. πνεῦμάpneumaspiritG4151N-NSNNoun Nominative Singular Neuter
  18. ἐστινestinareG1510V-PAI-3SVerb Present Active Indicative 3rd Singular
  19. καὶkaiandG2532CONJConjunction
  20. ζωήzōēlifeG2222N-NSFNoun Nominative Singular Feminine
  21. ἐστινestinthey areG1510V-PAI-3SVerb Present Active Indicative 3rd Singular
English is a literal word-by-word gloss of the Greek, not the KJV's wording. Why?

This is the original text the KJV's translators worked from — each Greek word with its own literal English meaning in this verse, prepared by scholars at Tyndale House, Cambridge. The KJV translates whole sentences, not word by word, so its wording differs: one Greek word can become several English words, and the KJV may choose “charity” where the gloss reads “love”. Both are faithful — they answer different questions. For the KJV's own rendering, switch to the KJV text.

Words in [ ] are added by the English.

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Study this verse

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This verse

Jesus teaches that the Spirit gives life, that human nature on its own profits nothing, and that his words are spirit and life.

“It is the spirit that quickeneth;”

“Quicken” is the KJV’s word for making alive, and the Spirit is the one who does it.

“the flesh profiteth nothing:”

Human nature on its own, and eating in the bodily way the grumblers imagined, gives no life.

“the words that I speak unto you, they are spirit, and they are life.”

His words carry the Spirit’s power and give the life they promise to those who believe them.

The Hard Saying That Divided His Disciples

John 6:60–66

Summary

Jesus has just taught in the synagogue at Capernaum that he is the bread of life, and that his flesh must be eaten and his blood drunk for anyone to have eternal life. Many of his own disciples call this an hard saying and grumble among themselves. Jesus knows what they are saying before anyone tells him. He asks whether it offends them, points them to the day when they will see him go up to where he was before, and tells them that it is the Spirit who gives life and that his words are spirit and life. He says plainly that some of them do not believe, because he has known from the beginning who they are and who will betray him, and that a person comes to him only when the Father gives it. From that time many turn back and walk with him no more. In these seven verses we meet the Lord who knows every heart, whose words give life, and who keeps speaking the truth when crowds walk away.

Why many disciples called it an hard saying

The “this” of verse 60 is the teaching Jesus has just given in the synagogue at Capernaum (John 6:22–59). The day before, he had fed five thousand people (John 6:1–15) and then walked on the water (John 6:16–21), and the crowd found him again hoping for more bread. He told them that he is the true bread that came down from heaven, greater than the manna their fathers ate in the wilderness (Exodus 16). At last he told them that unless they ate the flesh of the Son of Man and drank his blood they had no life in them (John 6:53). The small word oûn, “therefore”, ties what the disciples say next to what they have just heard.

Those who object are “many of his disciples”. The word mathētḗs, from manthanō, “to learn”, means a learner or pupil. Here it covers the wider company who had attached themselves to Jesus, drawn by his miracles and his teaching, beyond the Twelve, who stay with him when the others leave (John 6:68–69). polýs, “many”, tells us that a large part of that company spoke this way. These were people who had already given him some commitment, and now that commitment was being tested.

They call it “an hard saying”. sklērós first describes something dry, hard or tough, and used of words it means harsh or severe. The lógos, “saying”, is the whole of what he has said, above all his words about his flesh and blood. To them it was a harsh word that offended them and was hard to bear, as well as hard to understand. Their question, “who can hear it?”, uses tís, “who”, dýnamai, “can”, and akoúō, the ordinary verb “to hear”. They had all heard the words already. They are asking who could listen to such a thing and accept it, and they ask it already sure of the answer.

The words were shocking to Jewish hearers who took them in a bodily sense. The law of Moses strictly forbade eating blood (Leviticus 17:10–14), and eating human flesh was unthinkable. They heard his words in that bodily way and missed the spiritual truth he was teaching, that he himself, given for us, is the life we must receive by faith. The deeper reason lay in the heart. Many had followed him for the loaves, and when his teaching turned from bread for the body to his own person and his work, their faith proved shallow. Moses once told Israel that the LORD had not yet given them a heart to perceive (Deuteronomy 29:4), Jesus spoke of those who hear with their ears and still fail to understand (Matthew 13:10–17), and Paul writes that the natural man receives not the things of the Spirit of God (1 Corinthians 2:14). Truth from God is received by the grace of God, and Jesus says so himself in verse 65.

Jesus knows their murmuring

The disciples grumble among themselves, and “Jesus knew in himself” what they were saying. The verb eídō is properly “to see”, and it is used for knowing. “In himself” means that he knew it from within, before anyone reported it to him. John has already told us that Jesus “knew what was in man” (John 2:24–25), and the Samaritan woman told her town that he had told her everything she had ever done (John 4:29). The psalmist asks God to search him and know his heart (Psalm 139:23–24), and here the Son knows the hearts of his followers.

To murmur, gongýzō, is to grumble or complain in low tones, and the word carries discontent, often against those in authority. It recalls Israel in the wilderness, who murmured against Moses and Aaron when they wanted food (Exodus 16:2), a grumbling that came from a lack of trust in what God provided.

His question, “Doth this offend you?”, uses skandalízō, to trip someone up or make them stumble, and figuratively to make someone fall away. He is asking whether his teaching has become a stumbling block that will turn them from him. He already knew the answer. By asking, he brings their hidden grumbling into the open and sets the choice before them.

Christ and his word have caused stumbling from the start. Isaiah spoke of a stone of stumbling and a rock of offence (Isaiah 8:14), and Paul applies those words to Christ (Romans 9:33). Paul preached Christ crucified, a stumblingblock to the Jews (1 Corinthians 1:23), and Jesus said that he came to bring division (Luke 12:51). At Capernaum that division happens before our eyes.

What if they saw him go up where he was before?

Jesus answers the grumbling with a question he leaves unfinished: “What and if ye shall see the Son of man ascend up where he was before?” In Greek it opens with oûn, “then”. If this saying makes them stumble, what will they make of the sight he names?

The verb for see, theōréō, means to look at, behold, or be a spectator of something, and they would watch this with their own eyes. anabaínō is the common verb “to go up”. Luke records that the apostles watched as Jesus was taken up into heaven (Acts 1:9–11).

“Where he was before” teaches that the Son lived in heaven before he came to earth. The phrase joins ēn, the imperfect of the verb “to be”, “he was”, to próteron, “previously”. He came down from the Father and he would go back to him. John opens his Gospel with the Word who was with God in the beginning and was God, and who became flesh (John 1:1–14). Jesus told Nicodemus that the one who came down from heaven is the one who ascends there (John 3:13), and on the night before he died he prayed to be glorified with the glory he had with the Father before the world was (John 17:5).

“Son of man” is the name Jesus uses for himself most often, more than eighty times in the Gospels. It speaks of his true humanity, and it also recalls Daniel’s vision of one like the Son of man who came with the clouds of heaven and was given everlasting dominion (Daniel 7:13–14). Here Jesus joins that title to a heavenly origin and a heavenly return.

The question points two ways. To minds that stumbled at his words about his flesh, the sight of the Son of Man going up into heaven would be stranger and harder still. That same sight would also prove that he came from heaven as he said, and confirm his authority and all he had taught, the hard saying included. When he went up, he sat down at the right hand of God (Mark 16:19, Ephesians 1:20), where he intercedes for us (Romans 8:34). God has highly exalted him, so that every knee shall bow to him (Philippians 2:9–11), and he will come again with clouds (Revelation 1:7).

The Spirit gives life through his words

Verse 63 is the key Jesus gives to all he has said: “It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.”

pneûma means breath or wind, and by extension a spirit. Here it speaks first of the Holy Spirit, who gives life and understanding. To quicken, zōopoiéō, is to make alive. Life, and above all eternal life, zōē, comes from the Spirit. Paul says the same in his own words, that the letter kills and the Spirit gives life (2 Corinthians 3:6), and that the Spirit of him who raised up Jesus will give life to our mortal bodies (Romans 8:11).

sárx, flesh, is the body, and by extension human nature with its frailties. In the Old Testament flesh, basar, stands for man in his weakness and mortality, and spirit, ruach, for the power and life of God. Set beside the Spirit, the flesh is human nature working by its own strength and understanding, and it “profiteth nothing” toward eternal life. That speaks first to the grumblers. Eating flesh in the bodily way they imagined could give no one life, and neither could any effort or merit of ours.

His words “are spirit, and they are life”. They come from the Spirit and carry his life-giving power, so that when we receive them in faith they give the life they speak of. Jesus has already said that whoever hears his word and believes has everlasting life (John 5:24). God gives him the Spirit without measure (John 3:34). He is the resurrection and the life (John 11:25), and “the way, the truth, and the life” (John 14:6). He would send the Holy Spirit to teach his disciples and bring his words back to their remembrance (John 14:26). So we receive the bread of life by coming to Jesus and believing his words, as the Spirit works in us.

Does “the flesh profiteth nothing” speak against the body?

Jesus is speaking about where life comes from. Life comes from the Spirit, and human nature on its own, with its understanding and its efforts, can supply none of it. The body is God’s good work, and in this same chapter Jesus speaks of giving his own flesh for the life of the world (John 6:51).

Jesus knew who believed not, and who would betray him

Jesus goes on, “But there are some of you that believe not.” allá, “but”, marks a strong contrast. All of them had followed him and listened to him, and some had shared in his work, and still some of them lacked faith in him.

John explains how Jesus could say this: “For Jesus knew from the beginning who they were that believed not, and who should betray him.” The verb for knew is eídō again, as in verse 61. The beginning, archḗ (ex archēs, “from the beginning”), could be the start of his ministry or the day he called them, and since John’s Gospel opens with the Word who was in the beginning, it may reach back further still. Either way, he knew before any of it happened.

To betray, paradídōmi, is to hand over, deliver up or entrust, and here it means to hand someone over to his enemies. This is Judas Iscariot, one of the Twelve. Matthew shows him deliberately agreeing to betray Jesus (Matthew 26:14–16), and at the last supper Jesus told the Twelve that one of them would betray him (Matthew 26:21–25). After the resurrection Peter said that the Scripture had to be fulfilled concerning Judas, who had been numbered with them (Acts 1:16–17). A psalm speaks of a close friend who turns against the one who trusted him (Psalm 41:9), and Zechariah of a price of thirty pieces of silver (Zechariah 11:12–13).

So Jesus walked toward the cross knowing who would hand him over. Every step of it, the betrayal included, was known to him, and he went on willingly in obedience to his Father. Even this dark sin was taken up into God’s plan of salvation, the plan in which the prophets foretold the suffering of God’s servant (Isaiah 53).

Did Judas have a choice?

Judas chose freely and is responsible for what he did, and his betrayal was also known to Jesus from the beginning and served God’s purpose to save. Matthew shows his decision as a deliberate one, made out of his own covetousness and unbelief. Those who believed not, and the one who betrayed, acted from their own hearts, and their acts still fit within God’s plan. Scripture teaches both truths, and how they fit together is fully known to God alone.

Why did Jesus choose Judas?

Scripture leaves his reason unstated, and gives us what we need to know. Jesus chose him with full knowledge. The betrayal of the Messiah by one close to him had been foretold. And Jesus gave Judas the same teaching, the same care and the same opportunity as the other disciples, to the very end. That patience is grace.

No man can come unless the Father gives it

“Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.” Jesus is repeating what he said earlier in the chapter: “No man can come to me, except the Father which hath sent me draw him” (John 6:44). The “therefore”, diá toûto, ties the repetition to the unbelief he has just named. Some of them believe not, and this is why.

“Can”, dýnamai, speaks of ability. On our own we lack the power to come to him, and the lack lies in fallen human nature, which is blind to God’s truth until he opens it. “Come”, érchomai, is the everyday verb “to come” or “to go”. In this chapter coming to Jesus means believing in him and trusting him with one’s life. “Given”, dídōmi, is the ordinary verb “to give”, and the giver is the Father. Coming to Christ is his gift. Paul says that we are saved by grace through faith, and that it is “the gift of God” (Ephesians 2:8–9), and that it is given to believers to believe on Christ (Philippians 1:29).

The verse shows the Father and the Son working as one. The Father gives people to come “unto me”, to Jesus himself, who is the way to the Father. This truth humbles us. Whoever has come to Christ has come because the Father gave it, so the glory of our faith belongs to him. It is also a comfort when the gospel is refused, since opening hearts is God’s work, and it is why we pray for those we speak to about Christ.

Does this verse take away human choice?

This verse teaches that coming to Christ begins with the Father’s gift, and the rest of Scripture also calls every hearer to believe and holds each person accountable for the answer they give. The verse tells us how anyone comes to Christ, and it closes off all boasting.

Believers differ on how the Father’s giving works. Some believers hold that the Father gives this to those he has chosen and that his drawing surely brings them, turning a heart that was unwilling into one that gladly comes. Others hold that the Father’s drawing is an enabling grace that makes a willing response possible for those he draws, and they point to God’s desire that all should come to repentance (2 Peter 3:9) and to Christ as the atonement for the sins of the whole world (1 John 2:2). Both agree that the Father’s drawing works through the will and changes the heart, that every one who comes was brought by the Father, and that salvation is God’s work of grace.

Many went back and walked no more with him

“From that time many of his disciples went back, and walked no more with him.” The ones who leave are disciples again, mathētḗs, and many of them, polýs. They are the same people who called the saying hard in verse 60.

“Went back” joins apérchomai, to go away, with opísō, back or behind (apēlthon eis ta opisō). opísō is also the word for walking behind someone you follow as your leader, and these people now turn back from the one they had followed. To walk, peripatéō, is to walk about, and figuratively to live or behave. To walk with someone is to keep company with him and share his way, as Enoch walked with God (Genesis 5:24). “No more”, oukéti, means “no longer”. They had walked with him up to that day, and from that day they stopped.

This is the sifting the hard saying brought about. Jesus taught that the gate to life is strait and the way narrow, and that few find it (Matthew 7:13–14), and he told the crowds plainly what following him would cost (Luke 14:26–33). Verse 64 has already told us that some of these believed not. John later wrote of people who went out from the church because they had never truly been of it (1 John 2:19), and Hebrews sets those who draw back to perdition beside those who believe to the saving of the soul (Hebrews 10:39).

Jesus let them go, and his word stood as he had spoken it. In the verses that follow, Peter speaks for the Twelve and confesses that Jesus has “the words of eternal life”. Those who are truly his sheep hear his voice and follow him, and he promises that they shall never perish and that none can pluck them out of his hand or his Father’s hand (John 10:27–29).

The hard saying and the cross

All through John 6 the crowd wanted bread for the body, and Jesus kept pointing them to himself. The saying that drove many away pointed to the cross. The flesh he spoke of was the flesh the Word took when he became flesh, and the flesh he would give for the life of the world. He came to give his life a ransom for many (Mark 10:45), as “the Lamb of God, which taketh away the sin of the world” (John 1:29), because God so loved the world (John 3:16) and because the Son of man came to seek and to save the lost (Luke 19:10).

The cross would become a greater stumbling block than this saying, and Paul says that its preaching is foolishness to those who perish and the power of God to us who are saved (1 Corinthians 1:18). What the grumblers at Capernaum found too hard to hear is the very thing by which we live.

The Lord who knows us and speaks life

These verses show us Jesus as he is. He knows what is said in low voices and what is hidden in the heart. He knew from the beginning who would believe and who would betray him, and he went on toward the cross knowing it all. His words are spirit and life, and through them the Spirit makes the dead alive. Coming to him is the Father’s gift, so every one who comes stands there by grace.

The passage is honest about the cost of following him. Many walked with Jesus for a while and turned back when his teaching grew hard, and he let them go and kept his word unchanged. The ones who stayed had found in him the words of eternal life, and the Father who gave them to come keeps them in his hand. When a word of Christ is hard for us, it is still the word that is “spirit, and ... life”, and his question in verse 61 is put to everyone who hears him.

Last revised

Public-domain commentary

Matthew Henry

From his Commentary on the Whole Bible. Henry wrote on whole passages, and this entry covers John 6:60–71. He set out his notes in a four-level outline, kept here as he numbered it.

1662–1714 · 12 verses
Passage under commentJohn 6:60–71
I. II. Main points1. 2. Sub-points(1.) (2.) Details[1.] [2.] Fine details

We have here an account of the effects of Christ's discourse. Some were offended and others edified by it; some driven from him and others brought nearer to him.

I.To some it was a savour of death unto death; not only to the Jews, who were professed enemies to him and his doctrine, but even to many of his disciples, such as were disciples at large, who were his frequent hearers, and followed him in public; a mixed multitude, like those among Israel, that began all the discontents. Now here we have,

1.Their murmurings at the doctrine they heard (John 6:60): This is a hard saying, who can hear it?

(1.)They do not like it themselves: "What stuff is this? Eat the flesh, and drink the blood, of the Son of man! If it is to be understood figuratively, it is not intelligible; if literally, not practicable. What! must we turn cannibals? Can we not be religious, but we must be barbarous?" Si Christiani adorant quod comedunt (said Averroes), sit anima mea cum philosophis - If Christians adore what they eat, my mind shall continue with the philosophers. Now, when they found it a hard saying, if they had humbly begged of Christ to have declared unto them this parable, he would have opened it, and their understandings too; for the meek will he teach his way. But they were not willing to have Christ's sayings explained to them, because they would not lose this pretence for rejecting them - that they were hard sayings.

(2.)They think it impossible that any one else should like it: "Who can hear it? Surely none can." Thus the scoffers at religion are ready to undertake that all the intelligent part of mankind concur with them. They conclude with great assurance that no man of sense will admit the doctrine of Christ, nor any man of spirit submit to his laws. Because they cannot bear to be so tutored, so tied up, themselves, they think none else can: Who can hear it? Thanks be to God, thousands have heard these sayings of Christ, and have found them not only easy, but pleasant, as their necessary food.

2.Christ's animadversions upon their murmurings.

(1.)He well enough knew their murmurings, John 6:61. Their cavils were secret in their own breasts, or whispered among themselves in a corner. But,

[1.]Christ knew them; he saw them, he heard them. Note, Christ takes notice not only of the bold and open defiances that are done to his name and glory by daring sinners, but of the secret slights that are put upon his doctrine by carnal professors; he knows that which the fool saith in his heart, and cannot for shame speak out; he observes how his doctrine is resented by those to whom it is preached; who rejoice in it, and who murmur at it; who are reconciled to it, and bow before it, and who quarrel with it, and rebel against it, though ever so secretly.

[2.]He knew it in himself, not by any information given him, nor any external indication of the thing, but by his own divine omniscience. He knew it not as the prophets, by a divine revelation made to him (that which the prophets desired to know was sometimes hid from them, as 2 Kings 4:27), but by a divine knowledge in him. He is that essential Word that discerns the thoughts of the heart, Hebrews 4:12, Hebrews 4:13. Thoughts are words to Christ; we should therefore take heed not only what we say and do, but what we think.

(2.)He well enough knew how to answer them: "Doth this offend you? Is this a stumbling-block to you?" See how people by their own wilful mistakes create offences to themselves: they take offence where there is none given, and even make it where there is nothing to make it of. Note, We may justly wonder that so much offence should be taken at the doctrine of Christ for so little cause. Christ speaks of it here with wonder: "Doth this offend you?" Now, in answer to those who condemned his doctrine as intricate and obscure (Si non vis intelligi, debes negligi - If you are unwilling to be understood, you ought to be neglected),

[1.]He gives them a hint of his ascension into heaven, as that which would give an irresistible evidence of the truth of his doctrine (John 6:62): What and if you shall see the Son of man ascend up where he was before? And what then? First, "If I should tell you of that, surely it would much more offend you, and you would think my pretensions too high indeed. If this be so hard a saying that you cannot hear it, how will you digest it when I tell you of my returning to heaven, whence I came down?" See John 3:12. Those who stumble at smaller difficulties should consider how they will get over greater. Secondly, "When you see the Son of man ascend, this will much more offend you, for then my body will be less capable of being eaten by you in that gross sense wherein you now understand it;" so Dr. Whitby. Or, Thirdly, "When you see that, or hear it from those that shall see it, surely then you will be satisfied. You think I take too much upon me when I say, I came down from heaven, for it was with this that you quarrelled (John 6:42); but will you think so when you see me return to heaven?" If he ascended, certainly he descended, Ephesians 4:9, Ephesians 4:10. Christ did often refer himself thus to subsequent proofs, as John 1:50, John 1:51; John 2:14; Matthew 12:40; Matthew 26:64. Let us wait awhile, till the mystery of God shall be finished, and then we shall see that there was no reason to be offended at any of Christ's sayings.

[2.]He gives them a general key to this and all such parabolical discourses, teaching them that they are to be understood spiritually, and not after a corporal and carnal manner: It is the spirit that quickeneth, the flesh profiteth nothing, John 6:63. As it is in the natural body, the animal spirits quicken and enliven it, and without these the most nourishing food would profit nothing (what would the body be the better for bread, if it were not quickened and animated by the spirit), so it is with the soul. First, The bare participation of ordinances, unless the Spirit of God work with them, and quicken the soul by them, profits nothing; the word and ordinances, if the Spirit works with them, are as food to a living man, if not, they are as food to a dead man. Even the flesh of Christ, the sacrifice for sin, will avail us nothing unless the blessed Spirit quicken our souls thereby, and enforce the powerful influences of his death upon us, till we by his grace are planted together in the likeness of it. Secondly, The doctrine of eating Christ's flesh and drinking his blood, if it be understood literally, profits nothing, but rather leads us into mistakes and prejudices; but the spiritual sense or meaning of it quickens the soul, makes it alive and lively; for so it follows: The words that I speak unto you, they are spirit, and they are life. To eat the flesh of Christ! this is a hard saying, but to believe that Christ died for me, to derive from that doctrine strength and comfort in my approaches to God, my oppositions to sin and preparations for a future state, this is the spirit and life of that saying, and, construing it thus, it is an excellent saying. The reason why men dislike Christ's sayings if because they mistake them. The literal sense of a parable does us no good, we are never the wiser for it, but the spiritual meaning is instructive. Thirdly, The flesh profits nothing - those that are in the flesh (so some understand it), that are under the power of a carnal mind, profit not by Christ's discourses; but the Spirit quickeneth - those that have the Spirit, that are spiritual, are quickened and enlivened by them; for they are received ad modum recipientis - so as to correspond with the state of the receiver's mind. They found fault with Christ's sayings, whereas the fault was in themselves; it is only to sensual minds that spiritual things are senseless and sapless, spiritual minds relish them; see 1 Corinthians 2:14, 1 Corinthians 2:15.

[3.]He gives them an intimation of his knowledge of them, and that he had expected no better from them, though they called themselves his disciples, John 6:64, John 6:65. Now was fulfilled that of the prophet, speaking of Christ and his doctrine (Isaiah 53:1), Who hath believed our report? and to whom is the arm of the Lord revealed? Both these Christ here takes notice of.

First, They did not believe his report: "There are some of you who said you would leave all to follow me who yet believe not;" and this was the reason why the word preached did not profit them, because it was not mixed with faith, Hebrews 4:2. They did not believe him to be the Messiah, else they would have acquiesced in the doctrine he preached, and not have quarrelled with it, though there were some things in it dark, and hard to be understood. Oportet discentum credere - Young beginners in learning must take things upon their teacher's word. Note, 1. Among those who are nominal Christians, there are many who are real infidels. 2. The unbelief of hypocrites, before it discovers itself to the world, is naked and open before the eyes of Christ. He knew from the beginning who they were of the multitudes that followed him that believed, and who of the twelve should betray him; he knew from the beginning of their acquaintance with him, and attendance on him, when they were in the hottest pang of their zeal, who were sincere, as Nathanael (John 1:47), and who were not. Before they distinguished themselves by an overt act, he could infallibly distinguish who believed and who did not, whose love was counterfeit and whose cordial. We may gather hence, (1.) That the apostasy of those who have long made a plausible profession of religion is a certain proof of their constant hypocrisy, and that from the beginning they believed not, but is not a proof of the possibility of the total and final apostasy of any true believers: such revolts are not to be called the fall of real saints, but the discovery of pretended ones; see 1 John 2:19. Stella cadens non stella fuit - The star that falls never was a star. (2.) That it is Christ's prerogative to know the heart; he knows who they are that believe not, but dissemble in their profession, and yet continues them room in his church, the use of his ordinances, and the credit of his name, and does not discover them in this world, unless they by their own wickedness discover themselves; because such is the constitution of his visible church, and the discovering day is yet to come. But, if we pretend to judge men's hearts, we step into Christ's throne, and anticipate his judgment. We are often deceived in men, and see cause to change our sentiments of them; but this we are sure of, that Christ knows all men, and his judgment is according to truth.

Secondly, The reason why they did not believe his report was because the arm of the Lord was not revealed to them (John 6:65): Therefore said I unto you that no man can come to me, except it be given unto him of my Father; referring to John 6:44. Christ therefore could not but know who believed and who did not, because faith is the gift and work of God, and all his Father's gifts and works could not but be known to him, for they all passed through his hands. There he had said that none could come to him, except the Father draw him; here he saith, except it be given him of my Father, which shows that God draws souls by giving them grace and strength, and a heart to come, without which, such is the moral impotency of man, in his fallen state, that he cannot come.

3.We have here their final apostasy from Christ hereupon: From that time many of his disciples went back, and walked no more with him, John 6:66. When we admit into our minds hard thoughts of the word and works of Christ, and conceive a secret dislike, and are willing to hear insinuations tending to their reproach, we are then entering into temptation; it is as the letting forth of water; it is looking back, which, if infinite mercy prevent not, will end in drawing back; therefore Obsta principiis - Take heed of the beginnings of apostasy.

(1.)See here the backsliding of these disciples. Many of them went back to their houses, and families, and callings, which they had left for a time to follow him; went back, one to his farm and another to his merchandise; went back, as Orpah did, to their people, and to their gods, Ruth 1:15. They had entered themselves in Christ's school, but they went back, did not only play truant for once, but took leave of him and his doctrine for ever. Note, The apostasy of Christ's disciples from him, though really a strange thing, yet has been such a common thing that we need not be surprised at it. Here were many that went back. It is often so; when some backslide many backslide with them; the disease is infectious.

(2.)The occasion of this backsliding: From that time, from the time that Christ preached this comfortable doctrine, that he is the bread of life, and that those who by faith feed upon him shall live by him (which, one would think, should have engaged them to cleave more closely to him) - from that time they withdrew. Note, The corrupt and wicked heart of man often makes that an occasion of offence which is indeed matter of the greatest comfort. Christ foresaw that they would thus take offence at what he said, and yet he said it. That which is the undoubted word and truth of Christ must be faithfully delivered, whoever may be offended at it. Men's humours must be captivated to God's word, and not God's word accommodated to men's humours.

(3.)The degree of their apostasy: They walked no more with him, returned no more to him and attended no more upon his ministry. It is hard for those who have been once enlightened, and have tasted the good word of God, if they fall away, to renew them again to repentance, Hebrews 6:4-6.

II.This discourse was to others a savour of life unto life.

Many went back, but, thanks be to God, all did not; even then the twelve stuck to him. Though the faith of some be overthrown, yet the foundation of God stands sure. Observe here,

1.The affectionate question which Christ put to the twelve (John 6:67): Will you also go away? He saith nothing to those who went back. If the unbelieving depart, let them depart; it was no great loss of those whom he never had; lightly come, lightly go; but he takes this occasion to speak to the twelve, to confirm them, and by trying their stedfastness the more to fix them: Will you also go away? (1.) "It is at your choice whether you will or no; if you will forsake me, now is the time, when so many do: it is an hour of temptation; if you will go back, go now." Note, Christ will detain none with him against their wills; his soldiers are volunteers, not pressed men. The twelve had now had time enough to try how they liked Christ and his doctrine, and that none of them might afterwards say that they were trepanned into discipleship, and if it were to do again they would not do it, he here allows them a power of revocation, and leaves them at their liberty; as Joshua 24:15; Ruth 1:15. (2.) "It is at your peril if you do go away." If there was any secret inclination in the heart of any of them to depart from him, he stops it with this awakening question, "Wilt you also go away? Think not that you hang at as loose an end as they did, and may go away as easily as they could. They have not been so intimate with me as you have been, nor received so many favours from me; they are gone, but will you also go? Remember your character, and say, Whatever others do, we will never go away. Should such a man as I flee?" Nehemiah 6:11. Note, The nearer we have been to Christ and the longer we have been with him, the more engagements we have laid ourselves under to him, the greater will be our sin if we desert him. (3.) "I have reason to think you will not. Will you go away? No, I have faster hold of you than so; I hope better things of you (Hebrews 6:9), for you are they that have continued with me," Luke 22:28. When the apostasy of some is a grief to the Lord Jesus, the constancy of others is so much the more his honour, and he is pleased with it accordingly. Christ and believers know one another too well to part upon every displeasure.

2.The believing reply which Peter, in the name of the rest, made to this question, John 6:68, John 6:69. Christ put the question to them, as Joshua put Israel to their choice whom they would serve, with design to draw out from them a promise to adhere to him, and it had the like effect. Nay, but we will serve the Lord, Peter was upon all occasions the mouth of the rest, not so much because he had more of his Master's ear than they, but because he had more tongue of his own; and what he said was sometimes approved and sometimes reprimanded (Matthew 16:17, Matthew 16:23) - the common lot of those who are swift to speak. This here was well said, admirably well; and probably he said it by the direction, and with the express assent, of his fellow-disciples; at least he knew their mind, and spoke the sense of them all, and did not except Judas, for we must hope the best.

(1.)Here is a good resolution to adhere to Christ, and so expressed as to intimate that they would not entertain the least thought of leaving him: "Lord, to whom shall we go? It were folly to go from thee, unless we knew where to better ourselves; no, Lord, we like our choice too well to change." Note, Those who leave Christ would do well to consider to whom they will go, and whether they can expect to find rest and peace any where but in him. See Psalm 73:27, Psalm 73:28; Hosea 2:9. "Whither shall we go? Shall we make our court to the world? It will certainly deceive us. Shall we return to sin? It will certainly destroy us. Shall we leave the fountain of living waters for broken cisterns?" The disciples resolve to continue their pursuit of life and happiness, and will have a guide to it, and will adhere to Christ as their guide, for they can never have a better. "Shall we go to the heathen philosophers, and become their disciples? They are become vain in their imaginations, and, professing themselves to be wise in other things, are become fools in religion. Shall we go to the scribes and Pharisees, and sit at their feet? What good can they do us who have made void the commandments of God by their traditions? Shall we go to Moses? He will send us back again to thee. Therefore, if ever we find the way to happiness, it must be in following thee." Note, Christ's holy religion appears to great advantage when it is compared with other institutions, for then it will be seen how far it excels them all. Let those who find fault with this religion find a better before they quit it. A divine teacher we must have; can we find a better than Christ? A divine revelation we cannot be without; if the scripture be not such a one, where else may we look for it?

(2.)Here is a good reason for this resolution. It was not the inconsiderate resolve of a blind affection, but the result of mature deliberation. The disciples were resolved never to go away from Christ,

[1.]Because of the advantage they promised themselves by him: Thou hast the words of eternal life. They themselves did not fully understand Christ's discourse, for as yet the doctrine of the cross was a riddle to them; but in the general they were satisfied that he had the words of eternal life, that is, First, That the word of his doctrine showed the way to eternal life, set it before us, and directed us what to do, that we might inherit it. Secondly, That the word of his determination must confer eternal life. His having the words of eternal life is the same with his having power to give eternal life to as many as were given him, John 17:2. He had in the foregoing discourse assured eternal life to his followers; these disciples fastened upon this plain saying, and therefore resolved to stick to him, when the others overlooked this, and fastened upon the hard sayings, and therefore forsook him. Though we cannot account for every mystery, every obscurity, in Christ's doctrine, yet we know, in the general, that it is the word of eternal life, and therefore must live and die by it; for if we forsake Christ we forsake our own mercies.

[2.]Because of the assurance they had concerning him (John 6:69): We believe, and are sure, that thou art that Christ. if he be the promised Messiah, he must bring in an everlasting righteousness (Daniel 9:24), and therefore has the words of eternal life, for righteousness reigns to eternal life, Romans 5:21. observe, First, The doctrine they believed: that this Jesus was the Messiah promised to the fathers and expected by them, and that he was not a mere man, but the Son of the living God, the same to whom God had said, Thou art my Son, Psalm 2:7. In times of temptation to apostasy it is good to have recourse to our first principles, and stick to them; and, if we faithfully abide by that which is past dispute, we shall be the better able both to find and to keep the truth in matters of doubtful disputation. Secondly, The degree of their faith: it rose up to a full assurance: We are sure. We have known it by experience; this is the best knowledge. We should take occasion from others' wavering to be so much the more established, especially in that which is the present truth. When we have so strong a faith in the gospel of Christ as boldly to venture our souls upon it, knowing whom we have believed, then, and not till then, we shall be willing to venture every thing else for it.

3.The melancholy remark which our Lord Jesus made upon this reply of Peter's (John 6:70, John 6:71): Have not I chosen you twelve, and one of you is a devil? And the evangelist tells us whom he meant: he spoke of Judas Iscariot. Peter had undertaken for them all that they would be faithful to their Master. Now Christ does not condemn his charity (it is always good to hope the best), but he tacitly corrects his confidence. We must not be too sure concerning any. God knows those that are his; we do not. Observe here,

(1.)Hypocrites and betrayers of Christ are no better than devils. Judas not only had a devil, but he was a devil. One of you is a false accuser; so diabolos sometimes signifies (2 Timothy 3:3); and it is probable that Judas, when he sold his Master to the chief priests, represented him to them as a bad man, to justify himself in what he did. But I rather take it as we read it: He is a devil, a devil incarnate, a fallen apostle, as the devil a fallen angel. He is Satan, an adversary, an enemy to Christ. He is Abaddon, and Apollyon, a son of perdition. He was of his father the devil, did his lusts, was in his interests, as Cain, 1 John 3:12. Those whose bodies were possessed by the devil are never called devils (demoniacs, but not devils); but Judas, into whose heart Satan entered, and filled it, is called a devil.

(2.)Many that are seeming saints are real devils. Judas had as fair an outside as many of the apostles; his venom was, like that of the serpent, covered with a fine skin. He cast out devils, and appeared an enemy to the devil's kingdom, and yet was himself a devil all the while. Not only he will be one shortly, but he is one now. It is strange, and to be wondered at; Christ speaks of it with wonder: Have not I? It is sad, and to be lamented, that ever Christianity should be made a cloak to diabolism.

(3.)The disguises of hypocrites, however they may deceive men, and put a cheat upon them, cannot deceive Christ, for his piercing eye sees through them. He can call those devils that call themselves Christians, like the prophet's greeting to Jeroboam's wife, when she came to him in masquerade (1 Kings 14:6): Come in, thou wife of Jeroboam. Christ's divine sight, far better than any double sight, can see spirits.

(4.)There are those who are chosen by Christ to special services who yet prove false to him: I have chosen you to the apostleship, for it is expressly said that Judas was not chosen to eternal life (John 13:18), and yet one of you is a devil. Note, Advancement to places of honour and trust in the church is no certain evidence of saving grace. We have prophesied in thy name.

(5.)In the most select societies on this side heaven it is no new thing to meet with those that are corrupt. Of the twelve that were chosen to an intimate conversation with an incarnate Deity, as great an honour and privilege as ever men were chosen to, one was an incarnate devil. The historian lays an emphasis upon this, that Judas was one of the twelve that were so dignified and distinguished. Let us not reject and unchurch the twelve because one of them is a devil, nor say that they are all cheats and hypocrites because one of them was so; let those that are so bear the blame, and not those who, while they are undiscovered, incorporate with them. There is a society within the veil into which no unclean thing shall enter, a church of first-born, in which are no false brethren.

Historical interpretation

Two Centuries of Reception

12 surviving comments on this verse. Each one is dated, so this reads as a timeline rather than a list.

12 quotes · AD 220–444
Ante-NicenePost-Nicene
200300400

Select a marker to jump to its quote. Markers stagger vertically where authors wrote within a few decades of each other.

For it is "the Spirit that quickeneth" us for the kingdom of God; "the flesh profiteth nothing." There is, however, something else which can be profitable thereunto, that is, the Spirit; and through the Spirit, the works also of the Spirit.
d. AD 220TertullianAnte-NiceneSourceAgainst Marcion Book IV
Well, I on my side will first explain the reason of his offence, that I may the more easily explode the scandal of our heretic. Now, that the very Lord Himself of all might, the Word and Spirit of the Father, was operating and preaching on earth, it was necessary that the portion of the Holy Spirit which, in the form of the prophetic gift, had been through John preparing the ways of the Lord, should now depart from John, and return back again of course to the Lord, as to its all-embracing original.
He says, it is true, that "the flesh profiteth nothing; " but then, as in the former case, the meaning must be regulated by the subject which is spoken of.
If he says that “the flesh profits nothing,” then the meaning must take direction from the context of that remark. For seeing that they regarded his speech as hard and unbearable, as though he had really prescribed his flesh for them to eat, since his purpose was to assign the establishment of salvation to the Spirit, he first said, “It is the spirit that gives life,” and only then added, “the flesh profits nothing”—toward the giving of life, of course. He also proceeds to state how he wishes “the Spirit” to be understood. “The words that I have spoken to you are spirit and life.” … And so, when establishing his teaching as the Life-giver (because the Word is spirit and life), he also said that it is his flesh, because the Word also was made flesh. We ought therefore to desire him in order that we may have life. We ought to devour him with the ear, and to ruminate on him with the mind and to digest him by faith.
Learn now that as the Father is the Fount of life, so, too, many have stated that the Son is signified as the Fount of life. This is why he says that with you, almighty God, your Son is the Fount of life. That is the Fount of the Holy Spirit, for the Spirit is life, as the Lord says: “The words that I have spoken to you are spirit and life,” for where the Spirit is, there also is life. And where life is, there is also the Holy Spirit.
d. AD 407John Chrysostomas quoted by Aquinas, AD 1274Post-NiceneSourceCatena Aurea by Aquinas
(Hom. xlvii. 2) i. e. difficult to receive, too much for their weakness. They thought He spoke above Himself, and more loftily than He had a right to do; and so said they, Who can bear it? which was answering in fact for themselves, that they could not.

(Hom. xlvii. 2) The revelation however of these hidden things was a mark of His Divinity: hence the meaning of what follows; And if ye shall see the Son of man ascend up where He was before; supply, What will ye say? He said the same to Nathanael, Because I said to thee, I saw thee under the fig tree, believest thou? Thou shalt see greater things than these. He does not add difficulty to difficulty, but to convince them by the number and greatness of His doctrines. For if He had merely said that He came down from heaven, without adding any thing further, he would have offended His hearers more; but by saying that His flesh is the life of the world, and that as He was sent by the living Father, so He liveth by the Father; and at last by adding that He came down from heaven, He removed all doubt. Nor does He mean to scandalize His disciples, but rather to remove their scandal. For so long as they thought Him the Son of Joseph, they could not receive His doctrines; but if they once believed that He had come down from heaven, and would ascend thither, they would be much more willing and able to admit them.

(Hom. xlvii. 3) He tries to remove their difficulties in another way, as follows, It is the spirit that quickeneth, the flesh profiteth nothing: that is to say, You ought to understand My words in a spiritual sense: he who understands them carnally is profited nothing. To interpret carnally is to take a proposition in its bare literal meaning, and allow no other. But we should not judge of mysteries in this way; but examine them with the inward eye; i. e. understand them spiritually. It was carnal to doubt how our Lord could give His flesh to eat. What then? Is it not real flesh? Yea, verily. In saying then that the flesh profiteth nothing, He does not speak of His own flesh, but that of the carnal hearer of His word.

(Hom. xlvii. 2) i. e. are spiritual, have nothing carnal in them, produce no effects of the natural sort; not being under the dominion of that law of necessity, and order of nature established on earth.

(Hom. xlvii. 2) Having spoken of His words being taken carnally, He adds, But there are some of you that believe not. Some, He says, not including His disciples in the number. This insight shows His high nature.

(Hom. xlvii. 2) To let you know that it was before these words, and not after, that the people murmured and were offended, the Evangelist adds, For Jesus knew from the beginning, who they were that believed not, and who should betray Him.

(Hom. xlvi. 2) As if He said, Men's unbelief does not disturb or astonish Me: I know to whom the Father hath given to come to Me. He mentions the Father, to show first that He had no eye to His own glory; secondly, that God was His Father, and not Joseph.
"But many of the disciples, when they had heard this, said, This is a hard saying."

What means "hard"? Rough, laborious, troublesome. Yet He said nothing of this kind, for He spake not of a mode of life, but of doctrines, continually handling the faith which is in Him. What then means, "is a hard saying"? Is it because it promiseth life and resurrection? Is it because He said that He came down from heaven? Or that it was impossible for one to be saved who ate not His flesh? Tell me, are these things "hard"? Who can assert that they are? What then means "hard"? It means, "difficult to be received," "transcending their infirmity," "having much terror." For they thought that He uttered words too high for His real character, and such as were above Himself. Therefore they said, "Who can hear it?" Perhaps making excuse for themselves, since they were about to start away.

"When Jesus knew in Himself that His disciples murmured at it," (for this is an attribute of His Godhead to bring secret things to light,) "He said unto them, Doth this offend you? What and if ye shall see the Son of Man ascend up where He was before?"

This also He doth in the case of Nathanael, saying, "Because I said unto thee, I saw thee under the fig-tree, believest thou? Thou shall see greater things than these." And to Nicodemus, "No man hath ascended up to heaven but the Son of man which is in heaven." What then, doth He add difficulties to difficulties? No, (that be far from Him,) but by the greatness of the doctrines, and the number of them, He desireth to bring them over. For if one had said simply, "I have come down from heaven," and added nothing more, he would have been the more likely to offend them; but He who said, "My body is the life of the world"; He who said, "As the living Father hath sent Me, so I live by the Father"; and who said, "I have come down from heaven," solves the difficulty. For the man who utters any one great thing concerning himself may perhaps be suspected of feigning, but he who connects together so many one after another removes all suspicion. All that He doth and saith is intended to lead them away from the thought, that Joseph was His father. And it was not with a wish to strengthen, but rather to do away that stumbling-block, that He said this. For whosoever deemed that He was Joseph's son could not receive His sayings, while one that was persuaded that He had come down from heaven, and would ascend thither, might more easily give heed to His words: at the same time He bringeth forward also another explanation, saying, "It is the Spirit that quickeneth, the flesh profiteth nothing."

His meaning is, "Ye must hear spiritually what relateth to Me, for he who heareth carnally is not profited, nor gathereth any advantage." It was carnal to question how He came down from heaven, to deem that He was the son of Joseph, to ask, "How can he give us His flesh to eat?" All this was carnal, when they ought to have understood the matter in a mystical and spiritual sense. "But," saith some one, "how could they understand what the 'eating flesh' might mean?" Then it was their duty to wait for the proper time and enquire, and not to abandon Him.

"The words that I speak unto you, they are spirit and they are life."

That is, they are divine and spiritual, have nothing carnal about them, are not subject to the laws of physical consequence, but are free from any such necessity, are even set above the laws appointed for this world, and have also another and a different meaning. Now as in this passage He said "spirit," instead of "spiritual," so when He speaketh of "flesh," He meant not "carnal things," but "carnally hearing," and alluding at the same time to them, because they ever desired carnal things when they ought to have desired spiritual. For if a man receives them carnally, he profits nothing. "What then, is not His flesh, flesh?" Most certainly. "How then saith He, that the flesh profiteth nothing?" He speaketh not of His own flesh, (God forbid!) but of those who received His words in a carnal manner. But what is "understanding carnally"? It is looking merely to what is before our eyes, without imagining anything beyond. This is understanding carnally. But we must not judge thus by sight, but must look into all mysteries with the eyes within. This is seeing spiritually. He that eateth not His flesh, and drinketh not His blood, hath no life in him. How then doth "the flesh profit nothing," if without it we cannot live? Seest thou that the words, "the flesh profiteth nothing," are spoken not of His own flesh, but of carnal hearing?

"But there are some of you that believe not."

Again, according to His custom, He addeth weight to His words, by foretelling what would come to pass, and by showing that He spake thus not from desire of honor from them, but because He cared for them. And when He said "some," He excepted the disciples. For at first He said, "Ye have both seen Me, and believe not"; but here, "There are some of you that believe not."

For He "knew from the beginning who they were that believed not, and who should betray Him."

"And He said, Therefore said I unto you, that no man can come unto Me except it were given unto Him from above from My Father."

Here the Evangelist intimates to us the voluntary character of the Dispensation, and His endurance of evil. Nor is the, "from the beginning," put here without a cause, but that thou mayest be aware of His foreknowledge from the first, and that before the words were uttered, and not after the men had murmured nor after they had been offended, He knew the traitor, but before, which was an attribute of Godhead. Then He added, "Except it be given him from above from My Father"; thus persuading them to deem God His Father, not Joseph, and showing them that it is no common thing to believe in Him. As though He had said, "Unbelievers disturb Me not; trouble Me not, astonish Me not. I know of old before they were created, I know to whom the Father hath given to believe"; and do thou, when thou hearest that "He hath given," imagine not merely an arbitrary distribution, but that if any hath rendered himself worthy to receive the gift, he hath received it.
d. AD 430Augustine of Hippoas quoted by Aquinas, AD 1274Post-NiceneSourceCatena Aurea by Aquinas
(Tract. xxvii. s. 5) Or thus, the flesh profiteth nothing. They had understood by His flesh, as it were, of a carcase, that was to be cut up, and sold in the shambles, not of a body animated by the spirit. Join the spirit to the flesh, and it profiteth much: for if the flesh profited not, the Word would not have become flesh, and dwelt among us. The Spirit hath done much for our salvation, by means of the flesh.

For the flesh does not cleanse of itself, but by the Word who assumed it: which Word, being the principle of life in all things, having taken up soul and body, cleanseth the souls and bodies of those that believe. It is the spirit, then, that quickeneth: the flesh profiteth nothing; i. e. the flesh as they understood it. I do not, He seems to say, give My body to be eaten in this sense. He ought not to think of the flesh carnally: The words that I speak unto you, they are spirit, and they are life.

(Tr. xxvii) If then thou understandest them spiritually, they are life and spirit to thee: if carnally, even then they are life and spirit, but not to thee. Our Lord declares that in eating His body, and drinking His blood, we dwell in Him, and He in us. But what has the power to affect this, except love? The love of God is shed abroad in our hearts by the Holy Spirit, which is given to us. (Rom. 5:5)
d. AD 430Augustine of HippoPost-NiceneSourceTractates on John 27
What is it, then, that He adds? "It is the Spirit that quickeneth; the flesh profiteth nothing." Let us say to Him (for He permits us, not contradicting Him, but desiring to know), O Lord, good Master, in what way does the flesh profit nothing, whilst Thou hast said, "Except a man eat my flesh, and drink my blood, he shall not have life in him?" Or does life profit nothing? And why are we what we are, but that we may have eternal life, which Thou dost promise by Thy flesh? Then what means "the flesh profiteth nothing"? It profiteth nothing, but only in the manner in which they understood it. They indeed understood the flesh, just as when cut to pieces in a carcass, or sold in the shambles; not as when it is quickened by the Spirit. Wherefore it is said that "the flesh profiteth nothing," in the same manner as it is said that "knowledge puffeth up." Then, ought we at once to hate knowledge? Far from it! And what means "Knowledge puffeth up"? Knowledge alone, without charity. Therefore he added, "but charity edifieth." Therefore add thou to knowledge charity, and knowledge will be profitable, not by itself, but through charity. So also here, "the flesh profiteth nothing," only when alone. Let the Spirit be added to the flesh, as charity is added to knowledge, and it profiteth very much. For if the flesh profited nothing, the Word would not be made flesh to dwell among us. If through the flesh Christ has greatly profited us, does the flesh profit nothing? But it is by the flesh that the Spirit has done somewhat for our salvation. Flesh was a vessel; consider what it held, not what it was. The apostles were sent forth; did their flesh profit us nothing? If the apostles' flesh profited us, could it be that the Lord's flesh should have profited us nothing? For how should the sound of the Word come to us except by the voice of the flesh? Whence should writing come to us? All these are operations of the flesh, but only when the spirit moves it, as if it were its organ. Therefore "it is the Spirit that quickeneth; the flesh profiteth nothing," as they understood the flesh, but not so do I give my flesh to be eaten.

Hence "the words," saith He, "which I have spoken to you are Spirit and life." For we have said, brethren, that this is what the Lord had taught us by the eating of His flesh and drinking of His blood, that we should abide in Him and He in us. But we abide in Him when we are His members, and He abides in us when we are His temple. But that we may be His members, unity joins us together. And what but love can effect that unity should join us together? And the love of God, whence is it? Ask the apostle: "The love of God," saith he, "is shed abroad in our hearts by the Holy Spirit which is given to us." Therefore "it is the Spirit that quickeneth," for it is the Spirit that makes living members. Nor does the Spirit make any members to be living except such as it finds in the body, which also the Spirit itself quickens. For the Spirit which is in thee, O man, by which it consists that thou art a man, does it quicken a member which it finds separated from thy flesh? I call thy soul thy spirit. Thy soul quickeneth only the members which are in thy flesh; if thou takest one away, it is no longer quickened by thy soul, because it is not joined to the unity of thy body. These things are said to make us love unity and fear separation. For there is nothing that a Christian ought to dread so much as to be separated from Christ's body. For if he is separated from Christ's body, he is not a member of Christ; if he is not a member of Christ, he is not quickened by the Spirit of Christ. "But if any man," saith the apostle, "have not the Spirit of Christ, he is none of His." "It is the Spirit," then, "that quickeneth; the flesh profiteth nothing. The words that I have spoken to you are spirit and life." What means "are spirit and life"? They are to be understood spiritually. Hast thou understood spiritually? "They are spirit and life." Hast thou understood carnally? So also "are they spirit and life," but are not so to thee.
It is the Spirit That quickeneth, the flesh profiteth nothing.

It is not unreasonably (He says) that ye have clothed the flesh in no power of giving life. For when the nature of the flesh is considered alone and by itself, plainly it is not life-giving. For never will ought of things that are, give life, but rather it hath itself need of Him who is mighty to quicken. But when the Mystery of the Incarnation is carefully considered, and ye then learn who it is who dwelleth in this Flesh, ye will then surely feel (He says) unless you would accuse the Divine Spirit Itself also, that It can impart life, although of itself the flesh profiteth not a whit. For since it was united to the Life-giving Word, it hath become wholly Life-giving, hastening up to the power of the higher Nature, not itself forcing unto its own nature Him who cannot in any wise be subjected. Although then the nature of the flesh be in itself powerless to give life, yet will it inwork this, when it has the Life-working Word, and is replete with His whole operation. For it is the Body of that which is by Nature Life, not of any earthly being, as to whom that might rightly hold, The flesh profiteth nothing. For not the flesh of Paul (for instance) nor yet of Peter, or any other, would work this in us; but only and specially that of our Saviour Christ in whom dwelt all the fulness of the Godhead bodily. For verily it would be a thing most absurd that honey should infuse its own quality into things which naturally have no sweetness, and should have power to transfer into itself that wherewith it is mingled, and that the Life-giving Nature of God the Word should not be able to elevate to Its own good that Body which It indwelt. Wherefore as to all other things the saying will be true, that the flesh profiteth nothing; but as to Christ alone it holdeth not, by reason that Life, that is the Only-Begotten, dwelt therein. And He calls Himself Spirit, for God is a Spirit and as the blessed Paul saith, For the Lord is the Spirit. And we do not say these things, as taking away from the Holy Ghost His Proper Existence; but as He calls Himself Son of man, since He was made Man, so again He calls Himself Spirit from His Own Spirit. For not Other than He is His Spirit.
The words that I have spoken unto you, they are Spirit and are life.

He filleth whole His Own Body with the Life-giving operation of the Spirit. For He now calls the Flesh Spirit, not turning It aside from being Flesh: but because by reason of Its being perfectly united to Him, and now endued with His whole Life-giving Power, It ought to be called Spirit too. And no wonder, for be not offended at this. For if he that is joined unto the Lord is one spirit, how shall not His Own Body rather be called One with Him? Something of this kind then He means in the passage before us: I perceive from your reasonings within you (saith He) that ye foolishly imagine that I am telling you, that the body of earth is of its own nature life-giving: but this is not the drift of My words. For My whole exposition to you was of the Divine Spirit and of Eternal Life,. For it is not the nature of the flesh which renders the Spirit life-giving, but the might of the Spirit maketh the Body life-giving. The words then which I have discoursed with you, are spirit, that is spiritual and of the Spirit, and are life, i. e., life-giving and of that which is by Nature Life. And not as repudiating His Own Flesh does He say these things, but as teaching us what is the truth. For what we have just said, this will we repeat for profit sake. The nature of the flesh cannot of itself quicken (for what more is there in Him That is God by Nature?) yet will it not be conceived of in Christ as Alone and by Itself: for it has united to it the Word, Which is by Nature Life. When therefore Christ calls it life-giving, He does not testify the Power of quickening to It so much, as to Himself, or to His Spirit. For because of Him is His Own Body too Life-giving, since He re-elemented It to His Own Power. But the 'how,' is neither to be apprehended by the mind, nor spoken by the tongue, but honoured in silence and faith above understanding.

But that the Son too is often called by the name of Spirit by the God-inspired Scriptures, we shall know by what is subjoined. The blessed John then writes of Him, This is He That came by water and Spirit, Jesus Christ, not by water only, but by water and the Spirit 5: and it is the Spirit That beareth witness, because the Spirit is truth. Lo, he calleth the Spirit Truth, albeit Christ openly crieth out, I am the Truth. Paul again writes to us saying, They that are in the flesh cannot please God: but YE are not in the flesh, but in the Spirit, if so be that the Spirit of God dwelleth in you, but if any man have not the Spirit of Christ, he is not His. But if Christ be in you, the body is dead because of sin, the Spirit is life because of righteousness. Lo again herein having proved that the Spirit of God dwelleth in us, he hath said that Christ Himself is in us. For inseparable from the Son is His Spirit, according to the count of Identity of Nature, even though He be conceived of as having a Personal Existence. Therefore He often names indifferently, sometimes the Spirit, sometimes Himself.
Even the body of Christ itself was sanctified by the power of the Word made one with it, and it is thus endowed with living force in the blessed Eucharist so that is it able to implant in us its sanctifying grace.… For here too he says that the flesh can profit nothing, that is, to sanctify and quicken those who receive it, insofar as it is mere human flesh. But when flesh is understood and believed to be the temple of the Word, then surely it will be a channel of sanctification and life, not altogether of itself but through God who has been made one with it, who is holy and life.
Source: Quotations drawn from early Church Fathers and historical Christian theologians (AD 100–1500). Some quotes address the surrounding passage context rather than this verse alone.

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