Matthew 17:20

(Verse 20.) However, this kind does not go out, except by prayer and fasting. While he teaches how the most wicked demon can be expelled, he instructs everyone for life.

"Then came His disciples unto Him apart, and asked Him, why they could not themselves cast out the devil." To me they seem to be in anxiety and fear, lest haply they had lost the grace, with which they had been entrusted. For they received power against unclean spirits. Wherefore also they ask, coming to Him apart; not out of shame (for if the fact had gone abroad, and they were convicted, it were superfluous after that to be ashamed of confessing it in words); but it was a secret and great matter they were about to ask Him of. What then saith Christ? "Because of your unbelief," saith He; "for if ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove, and it shall remove; and nothing shall be impossible unto you." Now if you say, "Where did they remove a mountain?" I would make this answer, that they did far greater things, having raised up innumerable dead. For it is not at all the same thing, to remove a mountain, and to remove death from a body. And certain saints after them, far inferior to them, are said actually to have removed mountains, when necessity called for it. Whereby we see that these also would have done the same, need calling on them. But if there was then no need for it, do not thou find fault. And besides, He Himself said not, "ye shall surely remove it," but "ye shall be able to do even this." And if they did it not, it was not because they were unable (how could this be, when they had power to do the greater things?), but because they would not, there being no need. And it is likely that this too may have been done, and not have been written; for we know that not all the miracles they wrought were written. Then however they were in a state by comparison very imperfect. What then? Had they not at that time so much as this faith? […]

(Mor. pref. c. 2.) The mustard-seed, unless it be bruised, does not give out its qualities, so if persecution fall upon a holy man, straightway what had seemed weak and contemptible in him is roused into the heat and fervour of virtue.

For faith gives our minds such a capacity for the heavenly gifts, that whatsoever we will we may easily obtain from a faithful Master.

Jesus said to them. Here he responds. And first he satisfies them; secondly, he proposes a general teaching, at but this kind is not cast out but by prayer and fasting. Concerning the first, first he responds to the question, and secondly he makes the …

(interlin.) So that the sense then is, Ye shall say to this mountain, that is to the proud devil, Remove hence, that is from the possessed body into the sea, that is into the depths of hell, and it shall remove, and nothing shall be impossible to you, that is, no sickness shall be incurable.

Then came the disciples to Jesus apart, and said, Why could not we cast him out? And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto …

Because of your unbelief - Because in this particular they had not faith. If ye have faith as a grain of mustard seed - That is, the least measure of it. But it is certain, the faith which is here spoken of does not always imply saving faith.

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.

"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.

And Jesus said unto them, because of your unbelief,.... The Arabic and Ethiopic versions read, "because of your little faith", or "the smallness of your faith"; and so does one Greek manuscript; and which is what is doubtless meant by their unbelief; for they were not altogether destitute of faith, but their faith was very low, and their unbelief very great.

Because of your unbelief - Are we preachers of the Gospel? Do the things of God rest upon our minds with a deep and steady conviction? Can we expect that a doctrine which we do not, from conviction, credit ourselves, can be instrumental in our hands of begetting faith in others? So we preached, end so ye believed. The word preached generally begets in the people the same spirit which the preacher possesses. Instead of απιϚιαν, unbelief, the famous Vatican MS. and Cod. Cyprius, six others, Coptic, Ethiopic, Armenian, and Arabic, Origen, and Chrysostom, read ολιγοπιϚιαν, littleness of faith.

We read in this passage another of our Lord’s great miracles. He heals a young man lunatic and possessed with a devil. The first thing we see in these verses is a lively emblem of the awful influence sometimes exercised by Satan over the young. We are told of a certain man’s son, who was “lunatic and sore vexed.” We are told of the evil spirit pressing him on to the destruction of body and soul: “Oftimes he falleth into the fire and oft into the water.”

I put these two texts together for this reason. Those of you who are acquainted with the Revised Version know that the 21st verse in the 17th chapter of Matthew is left out. There seems to be little doubt that it was inserted in certain copies by persons who thought that it ought to be there because it was in Mark's narrative. It is put in the margin of the Revised Version, but it is left out of the text.

We read in this passage another of our Lord’s great miracles. He heals a young man lunatic and possessed with a devil. The first thing we see in these verses is a lively emblem of the awful influence sometimes exercised by Satan over the young. We are told of a certain man’s son, who was “lunatic and sore vexed.” We are told of the evil spirit pressing him on to the destruction of body and soul: “Oftimes he falleth into the fire and oft into the water.” It was one of those cases of Satanic possession which, however common in our Lord’s times, in our own day is rarely seen; but we can easily imagine that, when they did occur, they must have been peculiarly distressing to the relations of the afflicted. It is painful enough to see the bodies of those we love wracked by disease: how much more painful must it have been to see body and mind completely under the influence of the devil! “Out of hell,” says Bishop Hall, “there could not be greater misery.” But we must not forget that there are many instances of Satan’s spiritual dominion over young people which are quite as painful, in their way, as the case described in this passage. There are thousands of young men who seem to have wholly given themselves up to Satan’s temptations, and to be led “captive at his will” (2 Timothy ). They cast off all fear of God, and all respect for his commandments; they serve divers lusts and pleasures; they run wildly into every excess of riot; they refuse to listen to the advice of parents, teachers or ministers; they fling aside all regard for health, character or worldly respectability. They do all that lies in their power to ruin themselves, body and soul, for time and eternity: they are willing bond-slaves of Satan. Who has not seen such young men? They are to be seen in town and in country; they are to be found among rich and among poor.

THE NARRATIVE, of which our text forms a part, describes a scene which took place immediately after the transfiguration of our Lord. Not to divorce it therefore from its connection, let us glance at the antecedents of the case, that nothing may be lost by negligence, or that peradventure we may gain something by meditation. How great the difference between Moses and Christ!

THE NARRATIVE, of which our text forms a part, describes a scene which took place immediately after the transfiguration of our Lord. Not to divorce it therefore from its connection, let us glance at the antecedents of the case, that nothing may be lost by negligence, or that peradventure we may gain something by meditation. How great the difference between Moses and Christ! When Moses had been forty days upon the mountaintop, he underwent a kind of transfiguration, so that his face shone with exceeding brightness when he came down among the people, and he was obliged to put a veil over his face; for they could not bear to look upon his glory. Not so our Saviour! He had been really transfigured with a greater glory than Moses could ever know, and yet, as he came down from the mount, whatever radiance shone upon his face, it is not written that the people could not look upon him, but rather they were amazed, and running to him, they saluted him. The glory of the law repelled; for the majesty of holiness and justice, drive the awed spirits away from God. But the greater glory of Jesus attracts; though he is holy, and just, and righteous too, yet blended with these there is so much of truth and grace that sinners run to Jesus, amazed at his goodness, attracted by the charming fascination of his love, and they salute him, become his disciples, and take him to be their Lord and Master. Some of you may be just now blinded by the dazzling brightness of the law of God. You feel its claims on your conscience, but you cannot keep it in your life. It is too high; you cannot attain to it. Not that you find fault with the law; on the contrary, it commands your profoundest esteem.

I put these two texts together for this reason. Those of you who are acquainted with the Revised Version know that the 21st verse in the 17th chapter of Matthew is left out. There seems to be little doubt that it was inserted in certain copies by persons who thought that it ought to be there because it was in Mark's narrative. It is put in the margin of the Revised Version, but it is left out of the text. It is, therefore, very satisfactory to find that the omission from Matthew's account makes no real difference because we have the words in the 29th verse of the 9th of Mark, "This kind can come forth by nothing but by prayer and fasting." Only there is this fact to be noticed—in the Revised Version this verse runs, according to Mark, "This kind can come out by nothing, save by prayer." Whether the fasting was originally there, or not, I cannot tell, but putting together the two accounts in Matthew and Mark, we believe we have a full and true report of what the Master did actually say on this occasion. I. Observe then, dear Friends, at the outset, without any further preface, that WE MAY BE THE SERVANTS OF GOD AND YET WE MAY OCCASIONALLY BE DEFEATED. Those nine disciples who remained at the foot of the mountain when the Savior took the other three to behold His Transfiguration, had, each of them, a true commission from the Lord Jesus Christ. They were nine of His chosen Apostles. He had elected them in His own good pleasure and there was no doubt about their being really called to the Apostleship. They were not only elected, but they were also qualified, for on former occasions they had healed the sick, they had cast out devils and they had preached the Word of Christ with great power.

As a grain of mustard-seed - See the notes at Mat 13:31-32. The mustard-seed was the smallest of all seeds. It has been supposed by some, therefore, that he meant to say, If you have the smallest or feeblest faith that is genuine, you can do all things. The mustard-seed produced the largest of all herbs. It has been supposed by others, therefore, to mean, If you have increasing, expanding, enlarged faith, growing and strengthening from small beginnings, you can perform the most difficult undertaking. There is a principle of vitality in the grain of seed stretching forward to great results, which illustrates the nature of faith. Your faith should be like that. This is probably the true meaning. Ye shall say unto this mountain ... - Probably he pointed to a mountain near, to assure them that if they had such faith they might accomplish the most difficult undertakings - things that at first would appear impossible.