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“Summary of Israel's Unbelief”· John 12:37–43
Translation
King James Version
These things said Esaias, when he saw his glory, and spake of him.
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KJV (with Strong's)
These things G5023 said G2036 Esaias G2268, when G3753 he saw G1492 his G846 glory G1391, and G2532 spake G2980 of G4012 him G846.
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Complete Jewish Bible
(Yesha‘yahu said these things because he saw the Sh’khinah of Yeshua and spoke about him.)
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Berean Standard Bible
Isaiah said these things because he saw Jesus’ glory and spoke about Him.
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American Standard Version
These things said Isaiah, because he saw his glory; and he spake of him.
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World English Bible Messianic
Isaiah said these things when he saw his glory, and spoke of him.
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Geneva Bible (1599)
These things sayd Esaias when he sawe his glory, and spake of him.
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Young's Literal Translation
these things said Isaiah, when he saw his glory, and spake of him.
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In the KJVVerse 26,622 of 31,102 · 85.6%

Study This Verse

Summary

John 12:41 serves as a profound theological assertion by the Apostle John, directly identifying the "glory" seen by the prophet Isaiah in his temple vision (Isaiah 6) as the very glory of Jesus Christ. This verse is a pivotal statement in John's Gospel, unequivocally affirming the pre-existence and divine identity of Jesus with Yahweh, the God of Israel, and highlighting the continuity of divine revelation from the Old Testament to the New.

Context

Literary Context

John 12:41 concludes a significant section (John 12:37-43) where John grapples with the widespread unbelief among the Jewish people despite Jesus performing numerous miraculous signs. John attributes this rejection to the fulfillment of Old Testament prophecies. Specifically, he quotes Isaiah 53:1 regarding the lack of belief in the Lord's arm, and then Isaiah 6:9-10 concerning the spiritual blindness and hardened hearts that prevent people from understanding and turning to God. Verse 41 provides the profound theological basis for John's application of these prophecies, asserting that the "Lord" (Yahweh) whom Isaiah saw in his majestic temple vision was, in fact, Jesus Christ Himself. This assertion solidifies the divine authority behind the prophecies and underscores Jesus' identity as the fulfillment of Israel's hope.

Historical & Cultural Context

The first-century Jewish context was deeply steeped in the Hebrew Scriptures, particularly the prophetic books. Isaiah was revered as a major prophet, and his call vision in Isaiah 6 was understood as a direct encounter with the glorious presence of Yahweh, the God of Israel, enthroned in the temple. The concept of God's "glory" (Hebrew: kabod, Greek: doxa in the Septuagint) was central to Jewish theology, often associated with the visible manifestation of God's presence (the Shekinah glory). For John to assert that Isaiah saw "his glory" (referring to Jesus) was a radical and direct claim of Christ's divinity, aligning Him with the very essence of God revealed in the Old Testament. This statement would have been understood by Jewish readers as an explicit identification of Jesus with Yahweh.

Key Themes

This verse powerfully contributes to several overarching themes in John's Gospel and biblical theology. Foremost is the Deity of Christ, as John unequivocally states that the divine "glory" Isaiah witnessed was the glory of Jesus. This establishes Jesus' pre-existence and equality with the Father, a foundational tenet of Christian faith emphasized throughout John (e.g., John 1:1 and John 8:58). Secondly, it underscores the theme of Prophetic Fulfillment, demonstrating the seamless continuity and divine orchestration between the Old Testament prophecies and their ultimate culmination in the person and work of Jesus Christ. The Old Testament is not merely a historical record but a divinely inspired narrative pointing towards the Messiah. Finally, in its immediate context, the verse subtly touches upon Divine Sovereignty Amidst Unbelief. While human choice and responsibility for unbelief are clear, John's appeal to Isaiah's prophecy also highlights God's sovereign plan, which encompasses even the foretold rejection of His Son, revealing a deeper divine purpose at work.

Exposition and Analysis

Key Word Analysis

glory dóxa' G1391

From the base of dokéō, meaning "to seem, to think." Dóxa refers to glory as something very apparent, encompassing dignity, splendor, honor, praise, and worship. In the Septuagint (LXX), it frequently translates the Hebrew kabod, which signifies the manifest presence, weight, and splendor of God. In John 12:41, John's use of dóxa for Jesus' glory directly links Him to the divine manifestation of Yahweh seen by Isaiah in the temple.

saw eídō' G1492

A primary verb, meaning to see, literally or figuratively. By implication, especially in the perfect tense, it can mean "to know" or "to perceive." In this context, Isaiah's "seeing" Jesus' glory is not merely a physical observation but a profound spiritual apprehension and revelation of Christ's divine nature and majesty, indicating a direct encounter with the pre-incarnate Son.

spake laléō' G2980

A prolonged form of an otherwise obsolete verb, meaning to talk, utter words, preach, say, speak, or tell. This word emphasizes the verbal communication of Isaiah's prophetic message. The phrase "spake of him" means that Isaiah's prophecies, particularly those quoted by John concerning the spiritual blindness and the Messiah's rejection, were ultimately directed towards and fulfilled in Jesus Christ.

Verse Breakdown

"These things said Esaias"

This phrase refers directly to the preceding quotations from the prophet Isaiah in John 12:38 and John 12:39-40. John attributes these specific prophetic utterances, which explain the Jewish people's unbelief in Jesus, directly to Isaiah as their inspired author. It underscores the divine origin and authoritative nature of these prophecies.

"when he saw his glory"

This is the interpretive core of the verse. "His" refers unequivocally to Jesus Christ. John asserts that the "glory" Isaiah witnessed in his profound call vision recorded in Isaiah 6:1-5 was, in fact, the glory of the pre-incarnate Christ. This statement is a direct and powerful declaration of Jesus' deity, equating Him with the "Lord" (Yahweh) enthroned in the temple, whose train filled it, and whose holiness caused Isaiah to cry out in despair.

"and spake of him"

This clause further clarifies John's Christological interpretation of Isaiah's prophecy. It means that Isaiah's prophetic words, particularly those concerning the spiritual condition of Israel and the coming of the Messiah, were ultimately about Jesus. Isaiah's entire prophetic ministry, in John's view, was inextricably linked to the person and work of Christ, serving as a divine foreshadowing and explanation of events unfolding in Jesus' earthly ministry.

Literary Devices

John's use of Intertextuality is prominent in this verse, as he directly quotes and interprets Old Testament scripture (Isaiah 6:9-10) in light of New Testament events. This is not merely a citation but a profound Theological Interpretation, where John provides a Christological lens through which to understand Isaiah's vision. He employs a powerful Identification or Assertion, explicitly stating that the "Lord" (Yahweh) seen by Isaiah was Jesus Christ, thereby equating Jesus with the God of Israel. This bold theological claim serves as a Hermeneutical Key, unlocking the deeper meaning of Old Testament prophecy and demonstrating its fulfillment in Christ. The verse also functions as a Summary Statement, encapsulating John's argument about the divine foreknowledge of Israel's unbelief and the ultimate sovereignty of God's plan.

Theological and Thematic Connections

John 12:41 stands as a monumental verse for Christology, unequivocally declaring the divine identity of Jesus Christ. By asserting that Isaiah saw "his glory" (referring to Jesus), John directly equates Jesus with Yahweh, the Lord of Hosts, whose majesty filled the temple in Isaiah's vision. This means that Jesus is not merely a prophet, a good man, or even the greatest of God's creations; He is the eternal, pre-existent God, the very object of Old Testament worship. This profound connection highlights the seamless continuity of God's self-revelation across the Old and New Testaments, demonstrating that the God who revealed Himself to Israel's prophets is the same God who became incarnate in Jesus. It reinforces the truth that all of Scripture ultimately points to Christ, revealing His glory and His central role in God's redemptive plan.

Reflection and Application

John 12:41 offers a profound invitation to deepen our understanding and worship of Jesus Christ. To grasp that the "glory" Isaiah saw—the awe-inspiring, transcendent majesty of the Almighty God—was the glory of Jesus, should fill us with profound reverence and wonder. This truth challenges us to move beyond a superficial view of Jesus as merely a historical figure or a moral teacher, recognizing Him instead as the eternal God, co-equal with the Father, who condescended to dwell among us. For believers, this verse reinforces the bedrock of our faith, providing an unshakeable foundation for trust and worship. It calls us to adore Christ not just for what He did, but for who He eternally is: the Lord of Glory. For those seeking to understand Christianity, it presents a compelling and unique claim about Jesus' identity, drawing a direct line from ancient prophecy to His earthly ministry and divine nature. Ultimately, it reminds us that all of Scripture, from Genesis to Revelation, is a grand narrative pointing to Jesus, revealing His unparalleled glory and calling us to believe in Him and live in light of His divine majesty.

Questions for Reflection

  1. How does John 12:41 deepen your understanding of Jesus' identity and His relationship to God the Father?
  2. What does it mean for your personal faith and worship to know that Jesus is the "Lord of Hosts" whom Isaiah saw?
  3. How does recognizing Christ's pre-existence and divine glory influence your view of His earthly ministry, suffering, and resurrection?

FAQ

What is the primary theological significance of John 12:41?

The primary theological significance of John 12:41 is its explicit declaration of Jesus' deity and pre-existence. By stating that Isaiah saw "his glory" (referring to Jesus) when he had his vision of the Lord in Isaiah 6:1-5, John directly identifies Jesus with Yahweh, the God of Israel. This verse is a powerful assertion that Jesus is not merely a human prophet or Messiah, but is God Himself, the very Lord whom Isaiah encountered in His majestic holiness.

How does this verse relate to the unbelief described earlier in John 12?

John 12:41 provides the theological justification for John's application of Isaiah's prophecies concerning Israel's unbelief. In John 12:37, John notes that despite Jesus' many signs, people did not believe. He then quotes Isaiah 53:1 and Isaiah 6:9-10 to explain this phenomenon. Verse 41 then asserts that Isaiah "spake of him" (Jesus), meaning that Isaiah's prophecies about hardened hearts and spiritual blindness were ultimately about the rejection of Christ. This shows that the unbelief, while a human choice, was also part of God's foreordained plan, fulfilling ancient prophecy.

Christ-Centered Fulfillment

John 12:41 stands as a profound Christ-centered fulfillment, revealing Jesus as the ultimate culmination of God's self-revelation. For centuries, Israel had anticipated the coming of the Messiah, and here John unequivocally declares that the glorious "Lord" seen by Isaiah in the temple was none other than the pre-incarnate Christ. This verse transforms our understanding of Old Testament prophecy, showing that the divine glory that filled the temple and inspired the prophets was, in essence, the glory of Jesus. His incarnation, therefore, was not the arrival of a new deity, but the visible manifestation of the eternal God who had always been at the heart of Israel's faith. As John 1:14 proclaims, "The Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father." Jesus is the "radiance of the glory of God" (Hebrews 1:3), and through His life, death, and resurrection, the once-hidden glory of God is fully displayed for all to see. The fulfillment in Christ means that the very God who was worshipped in the Old Testament temple now dwells among us, bringing salvation and revealing the light of the knowledge of the glory of God in His face (2 Corinthians 4:6).

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Public-domain commentary

Matthew Henry

From his Commentary on the Whole Bible. Henry comments on passages, not single verses — this entry covers John 12:37–41. His four-level outline is real structure in the source text, so it is rendered as structure.

1662–1714 · 5 verses
Passage under commentJohn 12:37–41
I. II. Main points1. 2. Sub-points(1.) (2.) Details[1.] [2.] Fine details

We have here the honour done to our Lord Jesus by the Old Testament prophets, who foretold and lamented the infidelity of the many that believed not on him. It was indeed a dishonour and grief to Christ that his doctrine met with so little acceptance and so much opposition; but this takes off the wonder and reproach, makes the offence of it to cease, and made it no disappointment to Christ, that herein the scriptures were fulfilled. Two things are here said concerning this untractable people, and both were foretold by the evangelical prophet Isaiah, that they did not believe, and that they could not believe.

I.They did not believe (Joh 12:37):

Though he had done so many miracles before them, which, one would think, should have convinced them, yet they believed not, but opposed him. Observe,

1.The abundance of the means of conviction which Christ afforded them: He did miracles, so many miracles; tosauta sēmeia signifying both so many and so great. This refers to all the miracles he had wrought formerly; nay, the blind and lame now came to him into the temple, and he healed them, Mat 21:14. His miracles were the great proof of his mission, and on the evidence of them he relied. Two things concerning them he here insists upon: - (1.) The number of them; they were many, - various and of divers kinds; numerous and often repeated; and every new miracle confirmed the reality of all that went before. The multitude of his miracles was not only a proof of his unexhausted power, but gave the greater opportunity to examine them; and, if there had been a cheat in them, it was morally impossible but that in some or other of them it would have been discovered; and, being all miracles of mercy, the more there were the more good was done. (2.) The notoriety of them. He wrought these miracles before them, not at a distance, not in a corner, but before many witnesses, appearing to their own eyes.

2.The inefficacy of these means: Yet they believed not on him. They could not gainsay the premises, and yet would not grant the conclusion. Note, The most plentiful and powerful means of conviction will not of themselves work faith in the depraved prejudiced hearts of men. These saw, and yet believed not.

3.The fulfilling of the scripture in this (Joh 12:38): That the saying of Esaias might be fulfilled. Not that these infidel Jews designed the fulfilling of the scripture (they rather fancied those scriptures which speak of the church's best sons to be fulfilled in themselves), but the event exactly answered the prediction, so that (ut for ita ut) this saying of Esaias was fulfilled. The more improbable any event is, the more does a divine foresight appear in the prediction of it. One could not have imagined that the kingdom of the Messiah, supported with such pregnant proofs, should have met with so much opposition among the Jews, and therefore their unbelief is called a marvellous work, and a wonder, Isa 29:14. Christ himself marvelled at it, but it was what Isaiah foretold (Isa 53:1), and now it is accomplished. Observe,

(1.)The gospel is here called their report: Who has believed, tē akon hēmōn - our hearing, which we have heard from God, and which you have heard from us. Our report is the report that we bring, like the report of a matter of fact, or the report of a solemn resolution in the senate.

(2.)It is foretold that a few comparatively of those to whom this report is brought will be persuaded to give credit to it. Many hear it, but few heed it and embrace it: Who hath believed it? Here and there one, but none to speak of; not the wise, not the noble; it is to them but a report which wants confirmation.

(3.)It is spoken of as a thing to be greatly lamented that so few believe the report of the gospel. Lord is here prefixed from the Septuagint, but is not in the Hebrew, and intimates a sorrowful account brought to God by the messengers of the cold entertainment which they and their report had; as the servant came, and showed his lord all these things, Luk 14:21.

(4.)The reason why men believe not the report of the gospel is because the arm of the Lord is not revealed to them, that is, because they do not acquaint themselves with, and submit themselves to, the grace of God; they do not experimentally know the virtue and fellowship of Christ's death and resurrection, in which the arm of the Lord is revealed. They saw Christ's miracles, but did not see the arm of the Lord revealed in them.

II.They could not believe, and therefore they could not because Esaias said, He hath blinded their eyes.

This is a hard saying, who can explain it? We are sure that God is infinitely just and merciful, and therefore we cannot think there is in any such an impotency to good, resulting from the counsels of God, as lays them under a fatal necessity of being evil. God dams none by mere sovereignty; yet it is said, They could not believe. St. Austin, coming in course to the exposition of these words, expresses himself with a holy fear of entering upon an enquiry into this mystery. Justa sunt judicia ejus, sed occulta - His judgments are just, but hidden.

1.They could not believe, that is, they would not; they were obstinately resolved in their infidelity; thus Chrysostom and Austin incline to understand it; and the former gives divers instances of scripture of the putting of an impotency to signify the invincible refusal of the will, as Gen 37:4, They could not speak peaceably to him. And Joh 7:7. This is a moral impotency, like that of one that is accustomed to do evil, Jer 13:23. But,

2.They could not because Esaias had said, He hath blinded their eyes. Here the difficulty increases; it is certain that God is not the author of sin, and yet,

(1.)There is a righteous hand of God sometimes to be acknowledged in the blindness and obstinacy of those who persist in impenitency and unbelief, by which they are justly punished for their former resistance of the divine light and rebellion against the divine law. If God withhold abused grace, and give men over to indulged lusts, - if he permit the evil spirit to do his work on those that resisted the good Spirit, - and if in his providence he lay stumbling-blocks in the way of sinners, which confirm their prejudices, then he blinds their eyes, and hardens their hearts, and these are spiritual judgments, like the giving up of idolatrous Gentiles to vile affections, and degenerate Christians to strong delusions. Observe the method of conversion implied here, and the steps taken in it.

[1.]Sinners are brought to see with their eyes, to discern the reality of divine things and to have some knowledge of them.

[2.]To understand with their heart, to apply these things to themselves; not only to assent and approve, but to consent and accept.

[3.]To be converted, and effectually turned from sin to Christ, from the world and the flesh to God, as their felicity and portion.

[4.]Then God will heal them, will justify and sanctify them; will pardon their sins, which are as bleeding wounds, and mortify their corruptions, which are as lurking diseases. Now when God denies his grace nothing of this is done; the alienation of the mind fRom. and its aversion to, God and the divine life, grow into a rooted and invincible antipathy, and so the case becomes desperate.

(2.)Judicial blindness and hardness are in the word of God threatened against those who wilfully persist in wickedness, and were particularly foretold concerning the Jewish church and nation. Known unto God are all his works, and all ours too. Christ knew before who would betray him, and spoke of it, Joh 6:70. This is a confirmation of the truth of scripture prophecies, and thus even the unbelief of the Jews may help to strengthen our faith. It is also intended for caution to particular persons, to beware lest that come upon them which was spoken of in the prophets, Act 13:40.

(3.)What God has foretold will certainly come to pass, and so, by a necessary consequence, in order of arguing, it might be said that therefore they could not believe, because God by the prophets had foretold they would not; for such is the knowledge of God that he cannot be deceived in what he foresees, and such his truth that he cannot deceive in what he foretels, so that the scripture cannot be broken. Yet be it observed that the prophecy did not name particular persons; so that it might not be said, "Therefore such a one and such a one could not believe, because Esaias had said so and so;" but it pointed at the body of the Jewish nation, which would persist in their infidelity till their cities were wasted without inhabitants, as it follows (Isa 6:11, Isa 6:12); yet still reserving a remnant (Isa 6:13, in it shall be a tenth), which reserve was sufficient to keep a door of hope open to particular persons; for each one might say, Why may not I be of that remnant?

Lastly, The evangelist, having quoted the prophecy, shows (Joh 12:41) that it was intended to look further than the prophet's own days, and that its principal reference was to the days of the Messiah: These things said Esaias when he saw his glory, and spoke of him. 1. We read in the prophecy that this was said to Esaias, Isa 6:8, Isa 6:9. But here we are told that it was said by him to the purpose. For nothing was said by him as a prophet which was not first said to him; nor was any thing said to him which was not afterwards said by him to those to whom he was sent. See Isa 21:10. 2. The vision which the prophet there had of the glory of God is here said to be his seeing the glory of Jesus Christ: He saw his glory. Jesus Christ therefore is equal in power and glory with the Father, and his praises are equally celebrated. Christ had a glory before the foundation of the world, and Esaias saw this. 3. It is said that the prophet there spoke of him. It seems to have been spoken of the prophet himself (for to him the commission and instructions were there given), and yet it is here said to be spoken of Christ, for as all the prophets testified of him so they all typified him. This they spoke of him, that as to many his coming would be not only fruitless, but fatal, a savour of death unto death. It might be objected against his doctrine, If it was from heaven, why did not the Jews believe it? But this is an answer to it; it was not for want of evidence, but because their heart was made fat, and their ears were heavy. It was spoken of Christ, that he should be glorified in the ruin of an unbelieving multitude, as well as in the salvation of a distinguished remnant.

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Historical interpretation

Historical Reception

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

4 quotes · AD 339–430
Ante-NicenePost-Nicene
400

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

AD 339Eusebius of CaesareaPost-NiceneSourcePROOF OF THE GOSPEL 7.1
In approaching the account of his coming to humanity, the prophecy before us tells first of his divine kingdom, in which it says that the prophet saw him sitting on a throne high and exalted. This is that throne that is mentioned in the psalm of the Beloved. … John the Evangelist supports my interpretation of this passage, when he quotes the words of Isaiah, where it is said, “For this people’s heart has become fat, and their ears are dull of hearing, and they have closed their eyes,” referring them to Christ, saying, “This is what Isaiah said when he saw his glory and bore witness of him.” The prophet then seeing our Savior sitting on his Father’s throne in the divine and glorious kingdom, and moved by the Holy Spirit and being about to describe next his coming among humanity and his birth of a Virgin, foretells that his knowledge and praise would be over all the earth.
AD 407John Chrysostomas quoted by Aquinas, AD 1274Post-NiceneSourceCatena Aurea by Aquinas
(Hom. lxviii. 1) And thus the Evangelist tacitly explains it, when he adds, But though He had done so many miracles before them, yet they believed not on Him.

(Hom. lxviii. 2) But why then did Christ come? Did He not know that they would not believe in Him? Yes: the Prophets had prohibited this very unbelief, and He came that it might be made manifest, to their confusion and condemnation; That the saying of Esaias the prophet might be fulfilled, which He spake, Lord, who hath believed our report? and to whom hath the arm of the Lord been revealed?

(Hom. lxviii. 2) That the saying of Esaias might be fulfilled: that here is expressive not of the cause, but of the event. They did not disbelieve because Esaias said they would; but because they would disbelieve, Esaias said they would.

(Hom. lxviii. 2) This is a common form of speech among ourselves. I cannot love such a man, meaning by this necessity only a vehement will. The Evangelist says could not, to show that it was impossible that the Prophet should lie, not that it was impossible that they should believe.

(Hom. lxviii) For He does not leave us, except we wish Him, as He saith in Hosea, Seeing thou hast forgotten the law of thy God, I will also forget thy children. (Hos. 4:6) Whereby it is plain that we begin to forsake first, and are the cause of our own perdition. For as it is not the fault of the sun, that it hurts weak eyes, so neither is God to blame for punishing those who do not attend to His words.

(Hom. lxviii. 2) His glory means the vision of Him sitting on His lofty throne: I saw the Lord sitting upon a throne. Also I heard the voice of the Lord, saying, Whom shall I send, and who will go for us? (Is. 6:1)
"But though He had done so many miracles before them, yet they believed not on Him: that the saying of Isaiah the prophet might be fulfilled, which he spake, Lord, who hath believed our report and to whom hath the arm of the Lord been revealed?" Where he makes it sufficiently plain that the Son of God is Himself the arm of the Lord; not that the person of God the Father is determined by the shape of human flesh, and that the Son is attached to Him as a member of His body; but because all things were made by Him, and therefore He is designated the arm of the Lord. For as it is with thine arm that thou workest, so the Word of God is styled His arm; because by the Word He elaborated the world. For why does a man, in order to do some work, stretch forth his arm, but because the doing of it does not straightway follow his word? And if he was endowed with such pre-eminent power that what he said was done without any movement of his body, then would his word be his arm. But the Lord Jesus, the only-begotten Son of God the Father, as He is no mere member of the Father's body, so is He no mere thinkable, and audible, and transitory word; for, as all things were made by Him, He was the word of God.

When, therefore, we hear that the Son of God is the arm of God the Father, let no carnal custom raise its distracting din in our ears; but as far as His grace enables us, let us think of that power and wisdom of God by which all things were made. Surely such an arm as that is neither held out by stretching, nor drawn in by contracting it. For He is not one and the same with the Father, but He and the Father are one; and as equal with the Father, He is in all respects complete, as well as the Father: so that no room is left open for the abominable error of those who assert that the Father alone exists, but according to the difference of causes is Himself sometimes called the Son, sometimes the Holy Spirit.

There are some, then, who mutter among themselves, and sometimes speak out when they can, and even break forth into turbulent debate, saying: What did the Jews do, or what fault was it of theirs, if it was a necessity "that the saying of Isaiah the prophet should be fulfilled, which he spake, Lord, who hath believed our report and to whom hath the arm of the Lord been revealed?" To whom our answer is, that the Lord, in His foreknowledge of the future, foretold by the prophet the unbelief of the Jews; He foretold it, but did not cause it. For God does not compel any one to sin simply because He knows already the future sins of men. For He foreknew sins that were theirs, not His own; sins that were referable to no one else, but to their own selves. Accordingly, if what He foreknew as theirs is not really theirs, then had He no true foreknowledge: but as His foreknowledge is infallible, it is doubtless no one else, but they themselves, whose sinfulness God foreknew, that are the sinners. The Jews, therefore, committed sin, with no compulsion to do so on His part, to whom sin is an object of displeasure; but He foretold their committing of it, because nothing is concealed from His knowledge. And accordingly, had they wished to do good instead of evil, they would not have been hindered; but in this which they were to do they were foreseen of Him who knows what every man will do, and what He is yet to render unto such an one according to his work.

But the words of the Gospel also, that follow, are still more pressing, and start a question of more profound import: for He goes on to say, "Therefore they could not believe, because that Isaiah said again, He hath blinded their eyes, and hardened their heart; that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them." For it is said to us: If they could not believe, what sin is it in man not to do what he cannot do and if they sinned in not believing, then they had the power to believe, and did not use it. If, then, they had the power, how says the Gospel, "Therefore they could not believe, because that Isaiah said again, He hath blinded their eyes, and hardened their heart;" so that (which is of grave import) to God Himself is referred the cause of their not believing, inasmuch as it is He who "hath blinded their eyes, and hardened their heart"?

"They could not believe," because that Isaiah the prophet foretold it; and the prophet foretold it because God foreknew that such would be the case. But if I am asked why they could not, I reply at once, because they would not; for certainly their depraved will was foreseen by God, and foretold through the prophet by Him from whom nothing that is future can be hid. But the prophet, sayest thou, assigns another cause than that of their will. What cause does the prophet assign? That "God hath given them the spirit of remorse, eyes that they should not see, and ears that they should not hear; and hath blinded their eyes, and hardened their heart." This also, I reply, their will deserved. For God thus blinds and hardens, simply by letting alone and withdrawing His aid: and God can do this by a judgment that is hidden, although not by one that is unrighteous. This is a doctrine which the piety of the God-fearing ought to preserve unshaken and inviolable in all its integrity: even as the apostle, when treating of the same intricate question, says, "What shall we say then? is there unrighteousness with God? God forbid." If, then, we must be far from thinking that there is unrighteousness with God, this only can it be, that, when He giveth His aid, He acteth mercifully; and, when He withholdeth it, He acteth righteously: for in all He doeth, He acteth not rashly, but in accordance with judgment.

"These things said Isaiah, when he saw His glory, and spake of Him." What Isaiah saw, and how it refers to Christ the Lord, are to be read and learned in his book. For he saw Him, not as He is, but in some symbolical way to suit the form that the vision of the prophet had itself to assume. For Moses likewise saw Him, and yet we find him saying to Him whom he saw, "If I have found grace in Thy sight, show me now Thyself, that I may clearly see Thee;" for he saw Him not as He is. But the time when this shall yet be our experience, that same Saint John the Evangelist tells us in his Epistle: "Dearly beloved, [now] are we the sons of God; and it hath not yet become manifest what we shall be: because we know that, when He shall appear, we shall be like Him; for we shall see Him as He is." And be not deceived, brethren, by any of those who assert that the Father is invisible, and the Son visible. This assertion is made by those who think that the latter is a creature, and whose understanding runs not in harmony with the words, "I and my Father one." Accordingly, as respects the form of God wherein He is equal with the Father, the Son also is invisible: but, in order to be seen of men, He assumed the form of a servant, and being made in the likeness of men, became visible to man. He showed Himself, therefore, even before His incarnation, to the eyes of men, as it pleased Him, in the creature-form at His command, but not as He is. Let us be purifying our hearts by faith, that we may be prepared for that ineffable and, so to speak, invisible vision. For "blessed are the pure in heart; for they shall see God."
AD 430Augustine of Hippoas quoted by Aquinas, AD 1274Post-NiceneSourceCatena Aurea by Aquinas
(Tr. liii. 2) It is evident here that the arm of the Lord is the Son of God Himself. Not that the Father has a human fleshly form; He is called the arm of the Lord, because all things were made by Him. If a man had power of such a kind, as that without any motion of his body, what he said was forthwith done, the word of that man would be his arm. Here is no ground to justify, however, the error of those who say that the Godhead is one Person only, because the Son is the arm of the Father, and a man and his arm are not two persons, but one. These men do not understand, that the commonest things require to be explained often by applying language to them taken from other things in which there happens to be a likeness, [cand that, when we are upon things incomprehensible, and which cannot be described as they actually are, this is much more necessary. Thus one man calls another man, whom he makes great use of, his arm; and talks of having lost his arm, of having his arm taken away from him.] But some mutter, and ask, What fault was it of the Jews, if it was necessary that the sayings of Esaias should be fulfilled? We answer, that God, foreseeing the future, predicted by the Prophet the unbelief of the Jews, but did not cause it. God does not compel men to sin, because He knows they will sin. He foreknows their sins, not His own. The Jews committed the sin, which He who knows all things foretold they would commit.

(Tr. liii. 5) But what follows involved a deeper question: Therefore they could not believe, because that Esaias said again, He hath blinded their eyes, and hardened their hearts, that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them. That they should not believe; but if so, what sin is there in a man doing what he cannot help doing? And what is a graver point still, the cause is assigned to God; since He it is who blinded their eyes, and hardened their heart. This is not said to be the devil's doing, but God's. Yet if any ask why they could not believe, I answer, Because they would not. For as it is to the praise of the Divine will that God cannot deny Himself, so is it the fault of the human will that they could not believe.

(Tr. liii. 5) But the Prophet, you say, mentions another cause, not their will; viz. that God had blinded their eyes, and hardened their heart. But I answer, that they well deserved this. For God hardens and blinds a man, by forsaking and not supporting him; and this He may by a secret sentence, by an unjust one He cannot.

(Tr. liii. 11) And be converted, and I should heal them. Is not to be understood here, from the beginning of the sentence—that they should not see with their eyes, nor understand with their hearts, nor be converted; conversion being the free gift of God? ord, shall we suppose that a heavenly remedy is meant; whereby those who wished to establish their own righteousness, were so far deserted and blinded, as to stumble on the stumbling stone, till, with confusion of face, they humbled themselves, and sought not their own righteousness which puffeth up the proud, but God's righteousness, which justifieth the ungodly. For many of those who put Christ to death, were afterward troubled with a sense of their guilt; which led to their believing in Him. (c. 12). These things said Esaias, when he saw His glory, and spake of Him. He saw Him not really, but figuratively, in prophetic vision. Be not deceived by those who say that the Father is invisible, the Son visible, making the Son a creature. For in the form of God, in which He is equal to the Father, the Son also is invisible; though He took upon Him the form of a servant, that He might be seen by men. Before His incarnation too, He made Himself visible at times to human eyes; but visible through the medium of created matter, not visible as He is.
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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