Matthew 17:1-9. See also Mark 9:2-10; Luke 9:28-36.
And after six days - That is, six days from the conversation recorded in the last chapter.
Luke Luke 9:28 says, about an eight days after. Matthew mentions the six days that intervened between the day of the conversation and the transfiguration. Luke includes both those days, and thus reckons eight. Besides, Luke does not pretend to fix the precise time. He says, “about an eight days after.”
Taketh Peter, and James, and John - These three disciples were with him, also, in the garden of Gethsemane, Mark 14:33. He designed to prepare them in an eminent degree for the work of the gospel ministry by the previous manifestations of his glory, and of his patience in suffering.
Into a high mountain apart - That is, apart from the other disciples. It is commonly supposed that this was Mount Tabor, a high mountain in Galilee. The name of the mountain is not, however, mentioned in the New Testament. Luke adds Luke 9:28 that he went up there to pray. Our Saviour prayed much. When he did it he chose to be alone. For this purpose he often ascended mountains or went into the deserts. There is something in the solitude and deep and awful stillness of a lofty mountain favorable to devotion.

And was transfigured before them - The word “transfigure” means to change the appearance or form. It does not denote the change of the substance of a thing, but simply of its appearance. It puts on a new aspect. What this change was we are expressly told.
1. His face shone as the sun; that is, with a special brightness. A similar appearance is described respecting Moses when he came down from the mount, Exodus 34:29-30. See also Hebrews 1:3, where Christ is called the brightness of the glory of God: in the original, the splendor or shining, like the brightness of the sun.
2. The second change was that of his garments. They were white as the light. Mark says, “exceeding white as snow; so as no fuller on earth could white them.” The word “fuller” means, commonly, one who dresses cloth or fulls it, so as to make it more thick and strong. Here it means one who bleaches cloth or makes it white; one who cleanses garments when by wearing they become soiled. Among the Greeks that was a distinct trade. Luke says, “white and glistering,” that is, resplendent, shining, or a very bright white. There is no evidence here that what is commonly said of him is true, that his body was so changed as to show what his glorified body is. His body, so far as the sacred writers inform us, underwent no change. All this splendor and glory was a change in appearance only. The Scriptures should be taken just as they are, without any attempt to affix a meaning to them which the sacred writers did not intend.
Raiment - Clothing. John may refer to this transfiguration in John 1:14, as Peter does in 2 Peter 1:16-17.

And behold there appeared unto them Moses and Elias - Moses, a distinguished servant of God, by whom the law was given, and whose institutions typified the Messiah. It was particularly proper that he should appear, when his prophecies and types were about to be fulfilled, and the rites which he had instituted were about to be done away. Elias, or Elijah, a distinguished prophet, taken to heaven without seeing death. See 2 Kings 2:11. Elijah had been honored eminently by being thus translated, and still more by being made the model of the forerunner of the Messiah, Malachi 4:5; Luke 1:17; Matthew 11:14. They appeared “in glory” Luke 9:31; i. e., as they are in heaven with the glory which the redeemed have there.
Talking with him - Luke Luke 9:31 informs us that they conversed about “his decease which he should accomplish at Jerusalem.” To redeemed spirits that death was an object of intense interest. By faith in that death they had been saved; and now that the Redeemer of mankind was about to die, it is no wonder that this was the burden of his and their thoughts.
Luke adds Luke 9:32 that “Peter and they that were with him were heavy with sleep.” It is not improbable that this was in the night; that Jesus was engaged in prayer; and that he had permitted his weary followers to compose themselves to rest. It was after they were awaked that they saw this vision. Probably the sudden splendor, the bright shining aroused them from sleep.

Let us make here three tabernacles - A tabernacle is a tent. It was made, commonly, by fixing posts into the ground, and stretching on them cloth fastened by cords. See the notes at Isaiah 33:20. In some instances they were made of branches of trees a temporary shelter from the sun and rain, not a permanent dwelling. Peter was rejoiced at the vision and desirous of continuing it. He proposed, therefore, that they should prolong this interview and dwell there. Mark adds, “For he wist not (that is, knew not) what to say, for they were sore afraid.” They were frightened, amazed, and rejoiced; and, in the ecstasy of the moment, Peter proposed to remain there.

A bright cloud overshadowed them - The word “overshadow” here means, rather, to “be diffused” or “spread” over them. It does not mean that it made a shade. A cloud was the symbol of the divine presence. Thus, God went before the Israelites in a cloudy pillar - dark by day and bright by night Exodus 14:19-20; he appeared on Mount Sinai in a cloud bright by fire Exodus 24:15-17; and a cloud, the symbol of the divine presence - called the Shechinah - dwelt continually in the most holy place in the temple, 1 Kings 8:10-11; Ezekiel 1:4; Ezekiel 10:4. When, therefore, the disciples saw this cloud, they were prepared to hear the word of the Lord.
This is my beloved Son - This was the voice of God. This was the second time that, in a remarkable manner, God had declared this. See Matthew 3:17. This was spoken to confirm the disciples; to make known to them that it was their duty to hear Christ rather than any other, and to honor him more than Moses and Elijah; and to strengthen their faith in him when they should go forth to preach the gospel after he was shamefully put to death. After this, it was impossible for them to doubt that he was truly the Son of God. See 2 Peter 1:17-18.

They fell on their face - They entered into the cloud, or the cloud enveloped them, Luke 9:34. “They were therefore afraid.” They were awed at the presence of God, and prostrated themselves in solemn adoration on the ground, and their fears were removed only by the voice of their beloved Master. No man can see God and live; and it is only the glory of God, as it shines in the face of Christ (see 2 Corinthians 4:6), that mortals can bear.

Tell the vision to no man - This vision was designed particularly to confirm them in the truth that he was the Messiah. While he was with them it was unnecessary that they should relate what they had seen. When he was crucified they would need this evidence that he was the Christ. Then they were to use it. There were three witnesses of it as many as the law required Deuteronomy 17:6; Hebrews 10:28, and the proof that he was the Messiah was clear. Besides, if they had told it then, it would have provoked the Jews and endangered his life. His time was not yet come.
Vision - Sight; appearance. What they had seen on the mount.
Charged them - Gave them a commandment.
The sole design of this transfiguration was to convince them that he was the Christ; that he was greater than the greatest of the prophets; that he was the Son of God.
Mark adds Mark 9:10, “they kept that saying with themselves, questioning one with another what the rising from the dead should mean.” The Pharisees believed that the dead would rise, and there is no doubt that the disciples believed it; but their views were not clear, and, in particular, they did not understand what he meant by his rising from the dead. They do not appear to have understood, though he had told them Mark 12:40 that he would rise after three days.

And when they were come to the multitude - This took place on the day following the transfiguration, Luke 9:37. This multitude was probably composed of persons who had attended on his ministry, many of whom were his real disciples. With them, as Mark Mark 9:15 informs us, were “scribes questioning with them.” That is, they were probably professedly making inquiries about the Saviour, but really attempting to introduce their own sentiments, and to draw them off from him. They probably artfully asked them many questions about his birth, his family, his appearance, his manner of life, and his instructions, all which were contrary to the general expectation respecting the Messiah, and they intended, therefore, to insinuate that such a person could not be the Christ. The people were persuaded that he was the Messiah. and it would not have done to have attacked their opinions openly, but they attempted to gain the same point by sly insinuations. Error is always subtle, and often puts on the appearance of calm and honest inquiry. Well had he compared them to leavens, Matthew 16:11-12. The multitude, seeing Jesus coming down, left the scribes, and ran to meet him (Mark). They were amazed, probably because they had not expected to see him there. In their joy at meeting him in this unexpected manner, they “saluted” him (Mark); that is, probably they prostrated themselves before him after the manner of salutation in Eastern countries. See the notes at Luke 10:4. Jesus, seeing the scribes and their artful design, reproved them by asking them why they questioned thus with his disciples, Mark 9:16. Conscious of their guilt and their base purpose, they returned no answer.
A certain man kneeling down to him - That is, saluting him, or showing high regard for him. See the notes at Luke 10:4. It did not imply religious homage, but merely high respect and earnest entreaty.

Lord, have mercy - The word “Lord” here means “Sir,” a title of civility, not implying divinity.
My son - This was an only son (Luke). He was possessed with a devil. This calamity was attended with the following symptoms: he was lunatic (see the notes at Matthew 4:24); he was sore vexed; that is, he suffered greatly, or was greatly afflicted; he fell often suddenly, in the manner of persons having epileptic fits; he was dumb - that is, he was mute except when the seizure was coming upon him, for Luke says that when the spirit took him he cried suddenly out; he foamed and gnashed with his teeth, and wasted away, or became poor and emaciated. Luke Luke 9:39 adds of the evil spirit, “it teareth him that he foameth again, and, bruising him, hardly departeth from him;” that is, scarcely departed from him, or he had only short intervals of reason, for so the passage in Luke, “bruising him, hardly departeth from him,” should be translated.

And I brought him to thy disciples ... - That is, not to the apostles, for they had power over unclean spirits Matthew 10:8, but to others of his followers who attempted to work miracles. It is probable that many of his disciples attempted this who were not personal attendants on his ministry, Mark 9:38.

Then Jesus answered and said, O faithless and perverse generation! - Perverse means that which is twisted or turned from the proper direction; and is often used of the eyes, when one or both are turned from their natural position. Applied to a generation or race of people, it means that they hold opinions turned or perverted from the truth, and that they were wicked in their conduct. Jesus applied this, probably, to the Jews, and not to his real disciples.
How long shall I suffer you? - That is, how long shall I bear with you? How long is it necessary to show such patience and forbearance with your unbelief and perversity? This was not so much an expression of impatience or complaint as a reproof for their being so slow to believe that he was the Messiah, notwithstanding his miracles.
Mark adds Mark 9:20-22 that when he that was possessed was brought, the spirit, by a last desperate struggle, threw him down and tore him, and left him apparently dead. He adds further, that the case had existed during the whole life of his son, from a child. This was a case of uncommon obstinacy. The affliction was fixed and lasting. The disciples, seeing the obstinacy of the case - seeing that he was a deaf-mute, wasted away, torn, and foaming - despaired of being able to cure him. They lacked the faith which was necessary; doubted whether they could cure him, and therefore could not.
The father of the child said Mark 9:22, “If thou canst do anything, have compassion on us and help us;” an expression implying a weak faith, a lingering doubt whether he could restore him. Jesus replied to this, “If thou canst believe, all things are possible to him that believeth” Mark 9:23; implying that the difficulty in the case was not that he could not heal him, but that he had not the proper kind and degree of faith with which to come to him. That is, this cure shall be effected if you have faith. Not that his faith would give Jesus the power to heal him, but it would render it proper that he should exert that power in his favor. In this way, and in this only, are all things possible to believers.
The man had faith, Mark 9:24. The father came, as a father should do, weeping, and praying that his faith might be increased, so as to make it proper that Jesus should interpose in his behalf, and save his child.
Help my unbelief, Mark 9:24. This was an expression of humility. If my faith is defective, supply what is lacking. Help me to overcome my unbelief. Let not the defect of my faith be in the way of this blessing.

And Jesus rebuked the devil - The word “rebuke” has the combined force of reproving and commanding. He reproved him for having afflicted the child, and he commanded him to come out of him. Mark Mark 9:25 has recorded the words which he used words implying reproof and command: “Thou dumb and deaf spirit, I charge thee come out of him, and enter no more into him.” And the spirit cried, and with a mighty convulsion came out, leaving the child apparently dead. Jesus lifted him up by the hand (Mark), and gave him to his father (Luke).

Then came the disciples ... - This inquiry was made in some house to which they retired near the place where the miracle was performed (Mark). Jesus told them, in reply, that it was because of their unbelief that they had not been able to cast him out. They were appalled by the difficulty of the case and the obstinacy of the disease. Their faith would not have made it more easy for God to work this miracle, but such was his will - such the way in which he worked miracles, that he required faith in those who were the instruments.

As a grain of mustard-seed - See the notes at Matthew 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.

Howbeit, this kind ... - This kind means this kind of devils - this species of possession. Where they have had long possession where they produce such painful, fixed, and alarming effects, they can be expelled only in connection with prayer and fasting.
Goeth not out but by prayer and fasting - That is, in order to work miracles of this kind to cast out devils in cases so obstinate and dreadful as this, faith of the highest kind is necessary. That faith is produced and kept vigorous only by much prayer, and by such abstinence from food as fits the mind for the highest exercises of religion, and leaves it free to hold communion with God.