Matt. XVI. 28.
“Verily, verily, I say unto you, There are some of them that stand here, which shall not taste of death, until they see the Son of Man coming in His kingdom.”
Thus, inasmuch as He had discoursed much of dangers and death, and of His own passion, and of the slaughter of the disciples, and had laid on them those severe injunctions; and these were in the present life and at hand, but the good things in hope and expectation:— for example, “They save their life who lose it;” “He is coming in the glory of His Father;” “He renders His rewards:”— He willing to assure their very sight, and to show what kind of glory that is wherewith He is to come, so far as it was possible for them to learn it; even in their present life He shows and reveals this; that they should not grieve any more, either over their own death, or over that of their Lord, and especially Peter in His sorrow.
And see what He does. Having discoursed of hell, and of the kingdom (for as well by saying, “He that finds his life shall lose it, and whosoever will lose it for my sake, shall find it;” as by saying, “He shall reward every man according to his works,” He had manifested both of these): having, I say, spoken of both, the kingdom indeed He shows in the vision, but hell not yet.
Why so? Because had they been another kind of people, of a grosser sort, this too would have been necessary; but since they are approved and considerate, He leads them on the gentler way. But not therefore only does He make this disclosure, but because to Himself also it was far more suitable.
Not however that He passes over this subject either, but in some places He almost brings even before our eyes the very realities of hell; as when He introduces the picture of Lazarus, and mentions him that exacted the hundred pence, and him that was clad in the filthy garments, and others not a few.
2. “And after six days He takes with Him Peter and James and John.”
Now another says, “after eight,” not contradicting this writer, but most fully agreeing with him. For the one expressed both the very day on which He spoke, and that on which He led them up; but the other, the days between them only.
But mark thou, I pray you, the severe goodness of Matthew, not concealing those who were preferred to himself. This John also often does, recording the peculiar praises of Peter with great sincerity. For the choir of these holy men was everywhere pure from envy and vainglory.
Having taken therefore the leaders, “He brings them up into a high mountain apart, and was transfigured before them: and His face did shine as the sun, and His raiment was white as the light. And there appeared unto them Moses and Elias talking with Him.”
Wherefore does He take with Him these only? Because these were superior to the rest. And Peter indeed showed his superiority by exceedingly loving Him; but John by being exceedingly loved of Him; and James again by his answer which he answered with his brother, saying, “We are able to drink the cup;” nor yet by his answer only, but also by his works; both by the rest of them, and by fulfilling, what he said. For so earnest was he, and grievous to the Jews, that Herod himself supposed that he had bestowed herein a very great favor on the Jews, I mean in slaying him.
But wherefore does He not lead them up straightway? To spare the other disciples any feeling of human weakness: for which cause He omits also the names of them that are to go up. And this, because the rest would have desired exceedingly to have followed, being to see a pattern of that glory; and would have been pained, as overlooked. For though it was somewhat in a corporeal way that He made the disclosure, yet nevertheless the thing had much in it to be desired.
Wherefore then does He at all foretell it? That they might be readier to seize the high meaning, by His foretelling it; and being filled with the more vehement desire in that round of days, might so be present with their mind quite awake and full of care.
Source: Homilies on the Gospel of St. Matthew (New Advent)