Matthew 17:16
“Healing a Demon-Possessed Boy”Matthew 17:14–21
Bible text: King James Version (1769 Blayney text) · Public domain
Bible text: Berean Standard Bible · Public domain
Bible text: American Standard Version (1901) · Public domain
Bible text: World English Bible, Messianic edition · Public domain
Bible text: Geneva Bible (1599) · Public domain
Bible text: Young's Literal Translation · Public domain
- καὶkaiAndG2532CONJConjunction
- προσήνεγκαprosēnegkaI broughtG4374V-AAI-1SVerb Aorist Active Indicative 1st Singular
- αὐτὸνautonhimG846P-ASMPersonal pronoun Accusative Singular Masculine
- τοῖςtoisto theG3588T-DPMDefinite article Dative Plural Masculine
- μαθηταῖςmathētaisdisciplesG3101N-DPMNoun Dative Plural Masculine
- σουsouof YouG4771P-2GSPersonal pronoun Genitive 2nd Singular
- καὶkaiandG2532CONJConjunction
- οὐκouknotG3756PRT-NNegative Particle Negative
- ἠδυνήθησανēdunēthēsanthey were ableG1410V-AOI-3PVerb Aorist Passive Deponent Indicative 3rd Plural
- αὐτὸνautonhimG846P-ASMPersonal pronoun Accusative Singular Masculine
- θεραπεῦσαιtherapeusaito healG2323V-AANVerb Aorist Active Infinitive
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.
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Public-domain commentary
Matthew Henry
From his Commentary on the Whole Bible. Henry wrote on whole passages, and this entry covers Matthew 17:14–21. He set out his notes in a four-level outline, kept here as he numbered it.
We have here the miraculous cure of a child that was lunatic and vexed with a devil. Observe,
I.A melancholy representation of the case of this child, made to Christ by the afflicted father.
This was immediately upon his coming down from the mountain where he was transfigured. Note, Christ's glories do not make him unmindful of us and of our wants and miseries. Christ, when he came down from the mount, where had conversation with Moses and Elias, did not take state upon him, but was as easy of access, as ready to poor beggars, and as familiar with the multitude, as ever he used to be. This poor man's address was very importunate; he came kneeling to Christ. Note, Sense of misery will bring people to their knees. Those who see their need of Christ will be earnest, will be in good earnest, in their applications to him; and he delights to be thus wrestled with.
Two things the father of the child complains of.
1.The distress of his child (Matthew 17:15); Lord have mercy on my son. The affliction of the children cannot but affect the tender parents, for they are pieces of themselves. And the case of afflicted children should be presented to God by faithful and fervent prayer. This child's distemper, probably, disabled him to pray for himself. Note, Parents are doubly concerned to pray for their children, not only that are weak and cannot, but much more that are wicked and will not, pray for themselves. Now, (1.). The nature of this child's disease was very sad; He was lunatic and sore vexed. A lunatic is properly one whose distemper lies in the brain, and returns with the change of the moon. The devil, by the divine permission, either caused this distemper, or at least concurred with it, to heighten and aggravate it. The child had the falling-sickness, and the hand of Satan was in it; by it he tormented then, and made it much more grievous than ordinarily it is. Those whom Satan got possession of, he afflicted by those diseases of the body which do most affect the mind; for it is the soul that he aims to do mischief to. The father, in his complain, saith, He is lunatic, taking notice of the effect; but Christ, in the cure, rebuked the devil, and so struck at the cause. Thus he doth in spiritual cures. (2.) The effects of the disease were very deplorable; He oft falls into the fire, and into the water. If the force of the disease made him to fall, the malice of the devil made him to fall into the fire or water; so mischievous is he where he gains possession and power in any soul. He seeks to devour, 1 Peter 5:8.
2.The disappointment of his expectation from the disciples (Matthew 17:16); I brought him to thy disciples, and they could not cured him. Christ gave his disciples power to cast out devils (Matthew 10:1, Matthew 10:8), and therein they were successful (Luke 10:17); yet at this time they failed in the operation, though there were nine of them together, and before a great multitude. Christ permitted this,
(1.)To keep them humble, and to show their dependence upon him, that without him they could do nothing.
(2.)To glorify himself and his own power. It is for the honour of Christ to come in with help at a dead-lift, when other helpers cannot help. Elisha's staff in Gehazi's hand will not raise the child: he must come himself. Note, There are some special favours which Christ reserves the bestowment of to himself; and sometimes he keeps the cistern empty; that he may bring us to himself, the Fountain. But the failures of instruments shall not hinder the operations of his grace, which will work, if not by them, yet without them.
II.The rebukes that Christ gave to the people first, and then to the devil.
1.He chid those about him (Matthew 17:17); O faithless and perverse generation! This is not spoken to the disciples, but to the people, and perhaps especially to the scribes, who are mentioned in Mark 9:14, and who, as it should seem, insulted over the disciples, because they had now met with a case that was too hard for them. Christ himself could not do many mighty works among a people in whom unbelief reigned. It was here owing to the faithlessness of this generation, that they could not obtain those blessings from God, which otherwise they might have had; as it was owing to the weakness of the disciples' faith, that they could not do those works for God, which otherwise they might have done. They were faithless and perverse. Note, Those that are faithless will be perverse; and perverseness is sin in its worst colours. Faith is compliance with God, unbelief is opposition and contradiction to God. Israel of old was perverse, because faithless (Psalm 95:9), forward, for in them is no faith, Deuteronomy 32:20.
Two things he upbraids them with. (1.) His presence with them so long; "How long shall I be with you? Will you always need my bodily presence, and never come to such maturity as to be fit to be left, the people to the conduct of the disciples, and the disciples to the conduct of the Spirit and of their commission? Must the child be always carried, and will it never learn to go alone?" (2.) His patience with them so long; How long shall I suffer you? Note, [1.] The faithlessness and perverseness of those who enjoy the means of grace are a great grief to the Lord Jesus. Thus did he suffer the manners of Israel of old, Acts 13:18. [2.] The longer Christ has borne with a perverse and faithless people, the more he is displeased with their perverseness and unbelief; and he is God, and not man, else he would not suffer so long, nor bear so much, as he doth.
2.He cured the child, and set him to-rights again. He called, Bring him hither to me. Though the people were perverse, and Christ was provoked, yet care was taken of the child. Note, Though Christ may be angry, he is never unkind, nor doth he, in the greatest of his displeasure, shut up the bowels of his compassion from the miserable; Bring him to me. Note, When all other helps and succours fail, we are welcome to Christ, and may be confident in him and in his power and goodness.
See here an emblem of Christ's undertaking as our Redeemer.
(1.)He breaks the power of Satan (Matthew 17:18); Jesus rebuked the devil, as one having authority, who could back with force his word of command. Note, Christ's victories over Satan are obtained by the power of his word, the sword that comes out of his mouth, Revelation 19:21. Satan cannot stand before the rebukes of Christ, though his possession has been ever so long. It is comfortable to those who are wrestling with principalities and powers, that Christ hath spoiled them, Colossians 2:15. The lion of the tribe of Judah will be too hard for the roaring lion that seeks to devour.
(2.)He redresses the grievances of the children of men; The child was cured from that very hour. It was an immediate cure, and a perfect one. This is an encouragement to parents to bring their children to Christ, whose souls are under Satan's power; he is able to heal them, and as willing as he is able. Not only bring them to Christ by prayer, but bring them to the word of Christ, the ordinary means by which Satan's strongholds are demolished in the soul. Christ's rebukes, brought home to the heart, will ruin Satan's power there.
III.Christ's discourse with his disciples hereupon.
1.They ask the reason why they could not cast out the devil at this time (Matthew 17:19); They came to Jesus apart. Note, Ministers, who are to deal for Christ in public, have need to keep up a private communion with him, that they may in secret, where no eye sees, bewail their weakness and straitness, their follies and infirmities, in their public performances, and enquire into the cause of them. We should make use of the liberty of access we have to Jesus apart, where we may be free and particular with him. Such questions as the disciples put to Christ, we should put to ourselves, in communing with our own hearts upon our beds; Why were we so dull and careless at such a time? Why came we so much short in such a duty? That which is amiss may, when found out, be amended.
2.Christ gives them two reasons why they failed.
(1.)It was because of their unbelief, Matthew 17:20. When he spake to the father of the child and to the people, he charged it upon their unbelief; when he spake to his disciples, he charged it upon theirs; for the truth was, there were faults on both sides; but we are more concerned to hear of our own faults than of other people's, and to impute what is amiss to ourselves than to others. When the preaching of the word seems not to be so successful as sometimes it has been, the people are apt to lay all the fault upon the ministers, and the ministers upon the people; whereas, it is more becoming for each to own his own faultiness, and to say, "It is owing to me." Ministers, in reproving, must learn thus to give to each his portion of the word; and to take people off from judging others, by teaching all to judge themselves; It is because of your unbelief. Though they had faith, yet that faith was weak and ineffectual. Note,
[1.]As far as faith falls short of its due strength, vigour, and activity, it may truly be said, "There is unbelief." Many are chargeable with unbelief, who yet are not to be called unbelievers.
[2.]It is because of our unbelief, that we bring so little to pass in religion, and so often miscarry, and come short, in that which is good.
Our Lord Jesus takes this occasion to show them the power of faith, that they might not be defective in that, another time, as they were now; If ye have faith as a grain of mustard-seed, ye shall do wonders, Matthew 17:20. Some make the comparison to refer to the quality of the mustard-seed, which is, when bruised, sharp and penetrating; "If you have an active growing faith, not dead, flat, or insipid, you will not be baffled thus." But it rather refers to the quantity; "If you had but a grain of true faith, though so little that it were like that which is the least of all seeds, you would do wonders." Faith in general is a firm assent to, a compliance with, and a confidence in, all divine revelation. The faith here required, is that which had for its object that particular revelation by which Christ gave his disciples power to work miracles in his name, for the confirmation of the doctrine they preached. It was a faith in this revelation that they were defective in; either doubting the validity of their commission, or fearing that it expired with their first mission, and was not to continue when they were returning to their Master; or that it was some way or other forfeited or withdrawn. Perhaps their Master's absence with the three chief of his disciples, with a charge to the rest not to follow them, might occasion some doubts concerning their power, or rather the power of the Lord with them, to do this; however, there were not, at present, such a strong actual dependence upon, and confidence in, the promise of Christ's presence with them, as there should have been. It is good for us to be diffident of ourselves and of our own strength; but it is displeasing to Christ, when we distrust any power derived from him or granted by him.
If ye have ever so little of this faith in sincerity, if ye truly rely upon the powers committed to you, ye shall say to this mountain, Remove. This is a proverbial expression, denoting that which follows, and no more, Nothing shall be impossible to you. They had a full commission, among other things, to cast out devils without exception; but, this devil being more than ordinarily malicious and inveterate, they distrusted the power they had received, and so failed. To convince them of this, Christ shows them what they might have done. Note, An active faith can remove mountains, not of itself, but in the virtue of a divine power engaged by a divine promise, both which faith fastens upon.
(2.)Because there was something in the kind of the malady, which rendered the cure more than ordinarily difficult (Matthew 17:21); "This kind goes not out but by prayer and fasting. This possession, which works by a falling-sickness, or this kind of devils that are thus furious, is not cast out ordinarily but by great acts of devotion, and wherein ye were defective." Note,
[1.]Though the adversaries we wrestle, be all principalities and powers, yet some are stronger than others, and their power more hardly broken.
[2.]The extraordinary power of Satan must not discourage our faith, but quicken us to a greater intenseness in the acting of it, and more earnestness in praying to God for the increase of it; so some understand it here; "This kind of faith (which removeth mountains) doth not proceed, is not obtained, from God, nor is it carried up to its full growth, nor drawn out into act and exercise, but by earnest prayer." [3.] Fasting and prayer are proper means for the bringing down of Satan's power against us, and the fetching in of divine power to our assistance. Fasting is of use to put an edge upon prayer; it is an evidence and instance of humiliation which is necessary in prayer, and is a means of mortifying some corrupt habits, and of disposing the body to serve the soul in prayer. When the devil's interest in the soul is confirmed by the temper and constitution of the body, fasting must be joined with prayer, to keep under the body.
Historical interpretation
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"And when they were come to the multitude, there came to Him a man, kneeling down to Him, and saying, Lord, have mercy on my son, for he is lunatic, and sore vexed; for ofttimes he falleth into the fire, and oft into the water. And I brought him unto Thy disciples, and they could not cure him."
This man the Scripture signifies to be exceedingly weak in faith; and this is many ways evident; from Christ's saying, "All things are possible to him that believeth;" from the saying of the man himself that approached, "Help Thou mine unbelief:" from Christ's commanding the devil to "enter no more into him;" and from the man's saying again to Christ, "If Thou canst." "Yet if his unbelief was the cause," it may be said, "that the devil went not out, why doth He blame the disciples?" Signifying, that even without persons to bring the sick in faith, they might in many instances work a cure. For as the faith of the person presenting oftentimes availed for receiving the cure, even from inferior ministers; so the power of the doers oftentimes sufficed, even without belief in those who came to work the miracle.
And both these things are signified in the Scripture. For both they of the company of Cornelius by their faith drew unto themselves the grace of the Spirit; and in the case of Eliseus again, when none had believed, a dead man rose again. For as to those that cast him down, not for faith but for cowardice did they cast him, unintentionally and by chance, for fear of the band of robbers, and so they fled: while the person himself that was cast in was dead, yet by the mere virtue of the holy body the dead man arose.
Whence it is clear in this case, that even the disciples were weak; but not all; for the pillars were not present there. And see this man's want of consideration, from another circumstance again, how before the multitude he pleads to Jesus against His disciples, saying, "I brought him to Thy disciples, and they could not cure him."
But He, acquitting them of the charges before the people, imputes the greater part to him. For, "O faithless and perverse generation," these are His words, "how long shall I be with you?" not aiming at his person only, lest He should confound the man, but also at all the Jews. For indeed many of those present might probably be offended, and have undue thoughts of them.
But when He said, "How long shall I be with you," He indicates again death to be welcome to Him, and the thing an object of desire, and His departure longed for, and that not crucifixion, but being with them, is grievous.
He stopped not however at the accusations; but what saith He? "Bring him hither to me." And Himself moreover asks him, "how long time he is thus;" both making a plea for His disciples, and leading the other to a good hope, and that he might believe in his attaining deliverance from the evil.
And He suffers him to be torn, not for display (accordingly, when a crowd began to gather, He proceeded to rebuke him), but for the father's own sake, that when he should see the evil spirit disturbed at Christ's mere call, so at least, if in no other way, he might be led to believe the coming miracle.
And because he had said, "Of a child," and, "If thou canst help me," Christ saith, "To him that believeth, all things are possible," again giving the complaint a turn against him. And whereas when the leper said, "If Thou wilt, Thou canst make me clean," bearing witness to His authority Christ commending him, and confirming His words, said, "I will, be thou clean;" in this man's case, upon his uttering a speech in no way worthy of His power,-"If Thou canst, help me,"-see how He corrects it, as not rightly spoken. For what saith He? "If thou canst believe, all things are possible to him that believeth." What He saith is like this: "Such abundance of power is with me, that I can even make others work these miracles. So that if thou believe as one ought, even thou thyself art able," saith He, "to heal both this one, and many others." And having thus said, He set free the possessed of the devil.
But do thou not only from this observe His providence and His beneficence, but also from that other time, during which He allowed the devil to be in him. Since surely, unless the man had been favored with much providential care even then, he would have perished long ago; for "it cast him both into the fire," so it is said, "and into the water." And he that dared this would assuredly have destroyed the man too, unless even in so great madness God had put on him His strong curb: as indeed was the case with those naked men that were running in the deserts and cutting themselves with stones.
And if he call him "a lunatic," trouble not thyself at all, for it is the father of the possessed who speaks the word. How then saith the evangelist also, "He healed many that were lunatic?" Denominating them according to the impression of the multitude. For the evil spirit, to bring a reproach upon nature, both attacks them that are seized, and lets them go, according to the courses of the moon; not as though that were the worker of it;-away with the thought;-but himself craftily doing this to bring a reproach on nature. And an erroneous opinion hath gotten ground among the simple, and by this name do they call such evil spirits, being deceived; for this is by no means true.
is to be noted, that were not man fortified here by Providence, he would long since have perished; for the dæmons who cast him into the fire, and into the water, would have killed him outright, had God not restrained him.
See herein also his folly, in that before the multitude he appeals to Jesus against His disciples. But He clears them from shame, inputing their failure to the patient himself; for many things show that he was weak in faith. But He addresses His reproof not to the man singly, that He may not trouble him, but to the Jews in general. For many of those present, it is likely, had improper thoughts concerning the disciples, and therefore it follows, Jesus answered and said, O faithless and perverse generation, how long shall I be with you, how long shall I suffer you? His How long shall I be with you? shows that death was desired by Him, and that He longed for His withdrawal.
When He had vindicated His disciples, He leads the boy's father to a cheering hope of believing that he shall be delivered out of this evil and that the father might be led to believe the miracle that was coming, seeing the dæmons was disturbed even when the child was only called;
(Verse 16.) But Jesus replied, saying: O unbelieving and perverse generation, how long shall I be with you? How long shall I bear with you? Bring him here to me. Not because he was overcome by weariness, and gentle and meek, who did not open his mouth like a lamb before the shearer (Isaiah 53), nor did he burst forth in words of fury; but because, in the likeness of a physician, if he sees a sick person behaving contrary to his instructions, he may say: How long shall I come to your house, until I lose the skill of my craft, you commanding one thing and doing another? But he is not angry with the man, but with the fault; and through one man he accuses the Jews of unfaithfulness, so that he immediately says: Bring him here to me.
In saying, And I brought him to thy disciples, and they could not heal him, he covertly accuses the Apostles, whereas that a cure is impossible is sometimes the effect not of want of power in those that undertake it, but of want of faith in those that are to be healed,
Not that we must think that He was overcome by weariness of them, and that The meek and gentle broke out into words of wrath, but as a physician who might see the sick man acting against his injunctions, would say, How long shall I frequent your chamber? How long throw away the exercise of my skill, while I prescribe one thing, and you do another? That it is the sin, and not the man with whom He is angry, and that in the person of this one man He convicts the Jews of unbelief, is clear from what He adds, Bring him to me.
He rebuked him, that is, not the sufferer, but the dæmons.
Or, His reproof was to the child, because for his sins he had been seized on by the dæmons.
It may be known also, that not now for the first time, but of a long time, the Lord had borne the Jews' stubbornness, whence He says, How long shall I suffer you? because I have now a long while endured your iniquities, and ye are unworthy of My presence.
In which deed He left an example to preachers to attack sins, but to assist men.
The lunatic is figuratively one who is hurried into fresh vices every hour, one while is cast into the fire, with which the hearts of the adulterers burn; or again into the waters of pleasures or lusts, which yet have not strength to quench love. (Hos. 7:4, 6.)
Do you see how the man has shifted the blame for his own lack of faith upon the disciples, saying that they were too weak to heal? The Lord, therefore, shames him for accusing the disciples, saying, O faithless generation, that is, "It is not so much the fault of the weakness of the disciples as it is of your lack of faith, which, being great, has prevailed over the equal measure of their strength." He rebukes not only this man, but everyone who lacks faith, even the bystanders. By saying, How long shall I be with you? Christ shows that He longs for the Passion upon the Cross and His departure from them. For He is saying, "How long shall I live among scoffers and unbelievers? And Jesus rebuked him—whom? The man who was lunatic. From this it appears that he, too, lacked faith and his lack of faith had given occasion for the demon to enter him.
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This verse
The father had brought his son to the disciples first, and they were unable to heal him, though Jesus had given them power over unclean spirits.
“And I brought him to thy disciples,”
Prosphérō, to bring to. The father went first to the men Jesus had sent out with power to heal and to cast out devils (Matthew 10:1).
“and they could not cure him.”
Ou with dýnamai: they were unable. Therapeúō is the ordinary word for healing a disease, and the failure was public.
Passage studyMatthew 17:14–21
Jesus Heals the Boy His Disciples Failed to Cure
Summary
Jesus comes down from the mountain of the Transfiguration into a crowd, where a father kneels before him and begs mercy for his son. The boy suffers terribly, and the disciples who stayed below have been unable to cure him. Jesus grieves over a faithless generation, calls for the boy, rebukes the demon, and the child is cured from that very hour. In private he tells the disciples that their unbelief was the cause, that faith as small as a grain of mustard seed can move a mountain, and that this kind goes out only by prayer and fasting. The passage shows us a Lord whose power answers at a word, and it teaches us that his servants do his work only by trusting him.
From the mountain down to the crowd
The “they” who arrive in verse 14 are Jesus, Peter, James and John, coming down from the high mountain where the three had seen his glory and had seen Moses and Elijah with him (Matthew 17:1–13). The other disciples had stayed below. At the foot of the mountain there is a multitude, óchlos, a word for a throng of ordinary people, and in the middle of it a suffering child and a failure. The place was likely near Caesarea Philippi, a region of mountains and valleys. Mark and Luke tell the same event, Mark at greater length (Mark 9:14–29, Luke 9:37–43).
Jesus goes straight from glory into need, and that is the shape of his whole mission. Shortly before this he had told the disciples that he must go to Jerusalem, suffer many things and be killed (Matthew 16:21). The Son who shares the Father’s glory came down into our broken world to meet evil face to face. He is the high priest who is “touched with the feeling of our infirmities” (Hebrews 4:15), and so we are told to come boldly to the throne of grace to obtain mercy and find help in time of need (Hebrews 4:16). He is “the Lamb of God, which taketh away the sin of the world” (John 1:29), and the road down this mountain leads on to the cross.
A father kneels and asks for mercy
Matthew calls him “a certain man”, ánthrōpos, one person with one trouble who steps out of the crowd. He “came to” Jesus, prosérchomai, which means to approach or come near and is sometimes used of coming to worship. Then he kneels. The verb gonypetéō means to fall on the knee, and in that day people knelt this way before a king or anyone of great authority when they had an urgent plea. A leper came to Jesus in the same posture (Mark 1:40). The father’s knees say what he thinks of Jesus before his mouth says anything, and they fit what Jesus teaches about the humble being exalted (Matthew 23:12). One day every knee will bow at the name of Jesus (Philippians 2:10), and this father bows his early.
His first word is “Lord”, kýrios, a title of authority and mastery. It is a respectful address, and on the lips of a man kneeling for a miracle it owns that Jesus has the power to act. His request is for mercy, eleéō, which means to have compassion and to show it by word or deed. Mercy is help given to someone who has no claim to make, and the father asks on that footing. Mark records that he also asked Jesus to have compassion and help them if he could do anything (Mark 9:22), so this is a man whose hope had already been shaken once that day.
Was the boy a “lunatick” or possessed by a demon?
The father describes what he sees, and verse 18 names the cause. “Lunatick” translates selēniázomai, literally “moon-struck”. People in the ancient world linked conditions such as epilepsy and seizures to the phases of the moon, and the word carries that old belief. The father adds that the boy is “sore vexed”, kakōs páschō, which is to say that he suffers badly. The word pollákis, “often”, lies behind both “ofttimes” and “oft”, so these attacks were a regular part of the family’s life, and fire and water meant that any one of them could kill him.
Matthew then says plainly that “Jesus rebuked the devil; and he departed out of him”, and Mark and Luke speak of an unclean spirit and add that the boy foamed at the mouth, and Mark that he ground his teeth. In this boy’s case, then, the symptoms looked like what was called lunacy, and the cause behind them was a demon. Jesus’ own action settles it, because he speaks to the spirit and the child is well.
Why did the disciples fail?
Jesus gives the answer himself in verse 20: “Because of your unbelief.” The father had done a reasonable thing in going to them. He “brought” his son, prosphérō, a verb that simply means to bear or bring someone to another, and he brought him to men whom Jesus had given power against unclean spirits and power to heal (Matthew 10:1), with the charge to “cast out devils” (Matthew 10:8). A teacher’s disciples were expected to do such works, so their failure in front of a crowd was a public embarrassment.
“They could not cure him” joins ou, the plain word for “not”, to dýnamai, to be able. They tried and lacked the power. “Cure” is therapeúō, a word that first meant to wait upon or serve and then to relieve someone of disease, and the same word returns in verse 18 when the child is cured. The authority Jesus had given them was still his gift, exercised only in dependence on him, as he teaches when he calls himself the vine and his disciples the branches (John 15:5). Earlier successes may have left them leaning on themselves.
The disciples then do the right thing with their failure. They come to Jesus “apart”, kat’ idian, privately and away from the crowd, perhaps ashamed and certainly wanting a straight answer. Their “Why”, diatí, is the ordinary word for “why” or “wherefore”. “Could” is dýnamai again, the father’s own verb, and “cast out” is ekbállō, to throw or drive out, the usual Gospel word for expelling a demon.
Jesus names unbelief, apistía, which is distrust or a lack of faith. Elsewhere he speaks of “little faith”, oligópistos, as in Matthew 6:30, where faith is present and weak. Here the KJV has the stronger word: in that moment the disciples were failing to rely on God at all. Matthew has already shown what unbelief does, for in Nazareth Jesus “did not many mighty works there because of their unbelief” (Matthew 13:58). Hebrews warns believers against the same evil heart of unbelief that kept Israel out of God’s rest (Hebrews 3:12–19).
“O faithless and perverse generation”
Jesus’ cry opens with “O”, ō, an exclamation of deep feeling. “Faithless” is ápistos, disbelieving. “Perverse” is diastréphō, to distort or turn aside, the picture of something bent away from the straight. “Generation”, geneá, means the people living at one time. His two questions, “how long shall I be with you? how long shall I suffer you?”, are asked in sorrow, and “suffer” is anéchomai, to bear with or put up with. We hear in them the weight that human unbelief laid on the Son of God, and the patience that carried it.
Who is Jesus rebuking?
Jesus is speaking of the people of his time as a whole, with the disciples included in it. This was the generation that had seen his works and still asked for a sign (Matthew 12:39). The nine disciples had just shown that the unbelief around them had a hold on them too, so the rebuke lands on them as well as on the crowd.
What follows the rebuke matters as much as the rebuke. In the same breath Jesus says, “bring him hither to me.” He is weary of unbelief and he still helps the people caught in it. The same love appears in full at the cross, where “while we were yet sinners, Christ died for us” (Romans 5:8). His command also shows where every helper should carry those they are unable to help, which is to Jesus himself.
Jesus rebukes the demon, and the child is cured
“Rebuked” is epitimáō, which means to express strong disapproval, or to give a command that carries a threat. Jesus speaks, and that is all he does. “Devil” in the KJV here is daimónion, a demon or evil spirit, one of the beings that serve under Satan. It “departed”, exérchomai, the common verb for going out. The child “was cured”, therapeúō, and Matthew dates the cure “from that very hour”, with ekeînos, “that”, and hṓra, “hour”: the healing was complete from that point of the day.
Exorcists were known in that world, and they worked with rituals and incantations. Jesus used a plain command, as he did in the synagogue at Capernaum when he rebuked an unclean spirit (Mark 1:25) and the people said, “with authority commandeth he even the unclean spirits, and they do obey him” (Mark 1:27). Luke records the same amazement (Luke 4:36) and tells how Jesus healed every sick person brought to him (Luke 4:40). Peter later summed up his ministry in a sentence: God anointed Jesus of Nazareth with the Holy Ghost and with power, “who went about doing good, and healing all that were oppressed of the devil; for God was with him” (Acts 10:38).
This one deliverance is a small picture of all that Jesus came to do. “For this purpose the Son of God was manifested, that he might destroy the works of the devil” (1 John 3:8). He bore our griefs and carried our sorrows (Isaiah 53:4–5). At the cross he triumphed over principalities and powers (Colossians 2:15) and through death broke the one who held the power of death (Hebrews 2:14–15). All power in heaven and in earth is his (Matthew 28:18). Those who belong to him have been delivered “from the power of darkness” and brought into the kingdom of God’s dear Son (Colossians 1:13), the Son who makes people free indeed (John 8:36). The end of his work is a creation where death, sorrow, crying and pain are gone (Revelation 21:4).
Faith as a grain of mustard seed
“Verily I say unto you” marks a solemn statement. Faith, pístis, is persuasion and trust, a reliance on God. Jesus compares it to a grain of mustard seed, the tiny seed that he had already used in a parable because it grows into a plant large enough for birds to lodge in (Matthew 13:31–32). The point of the comparison is that real faith works even when it is small, because its strength lies in the God it trusts. The disciples’ trouble was the absence of living trust, and a seed’s worth of the real thing would have been enough. Jesus says the same to the apostles when they ask him to increase their faith (Luke 17:5–6), and he repeats the promise about the mountain later in Jerusalem (Matthew 21:21, Mark 11:23).
Can faith move a literal mountain?
Jesus is speaking in a figure, and the mountain stands for an obstacle that is far beyond human strength. Mountains in Scripture picture what is huge and fixed, and “moving a mountain” was a saying among Jewish teachers for overcoming a great difficulty. His hearers would have understood him to mean that faith does what people find impossible. He is not promising feats of earth-moving for their own sake.
“Nothing shall be impossible unto you” uses adynatéō, to be unable or impossible, and it answers the disciples’ “could not” directly. The promise rests on God, who asks through Jeremiah whether anything is too hard for him (Jeremiah 32:27), and it holds for what he purposes to do through his people. The power belongs to him and reaches us through trust, which is why Paul can say, “I can do all things through Christ which strengtheneth me” (Philippians 4:13), and why Jesus tells those who believe in him that they will do his works (John 14:12). The greatest mountains, sin and death and our separation from God, were moved by Christ himself, “the author and finisher of our faith” (Hebrews 12:2), and in him we are more than conquerors (Romans 8:37–39).
“This kind goeth not out but by prayer and fasting”
“Howbeit” translates dé, a small connecting word that adds a further point to what Jesus has said about faith. “This kind” is touto to génos, and génos means a kin, and so a class or type. There are spirits that hold on harder than others, and the disciples had met one. “Goeth not out” is ouk ekporeúetai, from ekporeúomai, to go or come out. Paul describes the same conflict when he says that we wrestle against principalities and powers and must be strong in the Lord (Ephesians 6:10–12).
The remedy is prayer, proseuchḗ, which is speaking to God and asking of him, and fasting, nēsteía, going without food for a religious purpose. Both are ways of depending on God, so this verse and the last one teach the same lesson from two sides. Faith trusts God for the work, and prayer and fasting are how that trust is exercised and deepened. The disciples knew these practices well. Moses fasted on the mountain (Exodus 34:28), Elijah went forty days in the strength of one meal (1 Kings 19:8), Daniel sought the Lord with prayer and fasting (Daniel 9:3), and the Pharisee of the parable fasted twice a week (Luke 18:12). Jesus himself fasted forty days in the wilderness and there defeated the devil’s temptations (Matthew 4:1–11), and he often withdrew to pray (Luke 5:16). James says that the effectual fervent prayer of a righteous man avails much (James 5:16).
Prayer and fasting earn nothing from God. They bring us into line with a victory Christ has already won, and they keep us leaning on the One who gave his disciples authority over all the power of the enemy (Luke 10:19) and who ever lives to make intercession for his people (Hebrews 7:25).
Why is this verse missing from some Bibles?
Verse 21 is absent from some of the earliest Greek manuscripts, among them Codex Vaticanus and Codex Sinaiticus, and so many modern translations omit it or set it in brackets. The KJV has it because it stands in the later manuscripts behind the Textus Receptus. Some hold that an early copyist brought it over from Mark’s account, where Jesus gives this same answer (Mark 9:29). Either way the teaching is Jesus’ own, since Mark records it, and it agrees with what the rest of Scripture says about prayer and fasting.
Is fasting always needed?
Jesus names prayer and fasting for “this kind”, the stubborn sort of case the disciples had just met. Fasting is a way of humbling ourselves and giving our whole attention to God in a hard matter, and it has its place in such times. Scripture makes it a help for particular battles and leaves ordinary prayer free of any such condition.
The Lord who says “Bring him hither to me”
This passage gives us a Lord who can be reached. He had just stood in glory, and a kneeling father with a broken child had his full attention at once. The mercy that father asked for is the mercy Hebrews tells us to come and obtain, and the one who gives it is the same today.
It also gives us an honest picture of his servants. Men who had cast out demons before failed here, and the passage neither hides it nor leaves them in it. When our own strength, experience and past successes come to nothing, we are where the nine stood, and their next step is open to us too, which was to go to Jesus privately and ask him why. He answered them plainly and without casting them off.
And it shows where the power lies. A mustard seed of faith is enough because of the God in whom it rests, and prayer and fasting are the ways he has given us to lean on him. Whatever others have been unable to mend, his word about the boy still stands over it: “bring him hither to me.”
Matthew 17:14
“And when they were come to the multitude,”
Jesus, Peter, James and John return from the mountain to the crowd, the óchlos, where the other disciples have been left with a need they could not meet.
“there came to him a certain man,”
One man, ánthrōpos, steps out of the throng. Prosérchomai is to approach or come near, and he comes to Jesus on purpose.
“kneeling down to him,”
Gonypetéō, to fall on the knee, the posture of someone pleading before a king. It shows his humility and what he believes Jesus can do.
“and saying,”
His words follow in the next two verses, a plea for his son and a report of the disciples’ failure.
Matthew 17:15
“Lord, have mercy on my son:”
Kýrios is a title of authority, and eleéō asks for compassion shown in action. He asks as one who has no claim except his need.
“for he is lunatick, and sore vexed:”
Selēniázomai is literally “moon-struck”, the old name for seizures. Kakōs páschō says that he suffers badly.
“for ofttimes he falleth into the fire, and oft into the water.”
Pollákis, “often”, shows how constant the attacks were, and fire and water show that each one put his life in danger.
Matthew 17:16 This verse
“And I brought him to thy disciples,”
Prosphérō, to bring to. The father went first to the men Jesus had sent out with power to heal and to cast out devils (Matthew 10:1).
“and they could not cure him.”
Ou with dýnamai: they were unable. Therapeúō is the ordinary word for healing a disease, and the failure was public.
Matthew 17:17
“Then Jesus answered and said,”
He answers the whole scene, the father’s report, the disciples’ failure and the watching crowd.
“O faithless and perverse generation,”
Ō is a cry of feeling. Ápistos is disbelieving, diastréphō is to distort or turn aside, and geneá is the people of that time, the disciples among them.
“how long shall I be with you?”
A question of sorrow from one whose time with them is short and whose works they have already seen.
“how long shall I suffer you?”
Anéchomai, to bear with. His patience is real and it is being tried.
“bring him hither to me.”
The rebuke ends in an invitation. What the disciples could not do is to be brought to him.
Matthew 17:18
“And Jesus rebuked the devil;”
Epitimáō is a stern command, and daimónion is a demon. One word from Jesus is enough.
“and he departed out of him:”
Exérchomai, to go out. The spirit obeys at once.
“and the child was cured from that very hour.”
Therapeúō again, now accomplished. Ekeînos and hṓra mark “that hour” as the point from which the boy was well.
Matthew 17:19
“Then came the disciples to Jesus apart,”
Kat’ idian, privately. They take their failure to Jesus away from the crowd.
“and said,”
They ask him directly and at once.
“Why could not we cast him out?”
Diatí is “why”, dýnamai is the father’s word for their inability, and ekbállō is to drive out. They had done this before, which is why the failure puzzles them.
Matthew 17:20
“And Jesus said unto them, Because of your unbelief:”
Apistía, a lack of trust in God. The cause lay in their hearts, and their method had nothing to do with it.
“for verily I say unto you, If ye have faith as a grain of mustard seed,”
Pístis is trust in God. A seed is tiny and alive, and living faith of that size is enough.
“ye shall say unto this mountain, Remove hence to yonder place; and it shall remove;”
A figure for the obstacle that is beyond human strength, spoken within sight of real mountains.
“and nothing shall be impossible unto you.”
Adynatéō answers their “could not”. The promise rests on God’s power and serves his purposes.
Matthew 17:21
“Howbeit this kind”
Dé adds a further point. Génos is a class or type, here a kind of spirit that resists more than others.
“goeth not out”
Ekporeúomai, to go out. Such a spirit does not yield to a casual attempt.
“but by prayer”
Proseuchḗ, speaking to God and asking of him, the open admission that the power is his.
“and fasting.”
Nēsteía, going without food for a religious purpose, joined to prayer in earnest dependence on God. The verse is absent from some early manuscripts, and Mark gives the same saying (Mark 9:29).
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