(xi. de. Trin. c. 42) That God is glorified in Him, refers to the glory of the body, which glory is the glory of God, in that the body borrows its glory from its association with the Divine nature. Because God is glorified in Him, therefore He will glorify Him in Himself, in that He who reigns in the glory arising from the glory of God, He forthwith passes over into God's glorya, leaving the dispensation of His manhood, wholly to abide in God. Nor is He silent as to the time: And shall straightway glorify Him. This referring to the glory of His resurrection which was immediately to follow His passion, which He mentions as present, because Judas had now gone out to betray Him; whereas that God would glorify Him in Himself, He reserves for the future. The glory of God was shown in Him by the miracle of the resurrection; but He will abide in the glory of God when He has left the dispensation of subjection. The sense of these first words, Now is the Son of man glorified, is not doubtful: it is the glory of the flesh which is meant, not that of the Word. But what means the next, And God is glorified in Him? The Son of man is not another Person from the Son of God, for, the Word was made flesh. (John 1:14) How is God glorified in this Son of man, who is the Son of God? The next clause helps us; If God is glorified in Him, God also will glorify Him in Himself. A man is not glorified in himself, nor, on the other hand, does God who is glorified in man, because He receives glory, cease to be God. So the words, God is glorified in Him, either mean that Christ is glorified in the flesh, or that God is glorified in Christ. If God means Christ, it is Christ who is glorified in the flesh; if the Father, then it is the Sacrament of unity, the Father glorified in the Son. Again, God glorifies in Himself God glorified in the Son of man. This overthrows the impious doctrine that Christ is not very God, in verity of nature. For how can that which God glorifies in Himself be out of Himself? He whom the Father glorifies must be confessed to be in His glory, and He who is glorified in the glory of the Father, must be understood to be in the same case with the Father.
The meaning of his opening words can hardly be disputed when he says, “Now is the Son of man glorified.” He was saying that all the glory that [the Son of man] obtains is not for the Word but for his flesh.… What, then, is the meaning of what follows … when he says that “God is glorified in him,” that is, in the Son of man? Tell me, then, is the Son of man the same as the Son of God? And since the Son of man is not one entity and the Son of God another—but he who is the Son of God is himself also the Son of man—who, pray tell, is the God who is glorified in this Son of man who is also the Son of God?… The third clause helps us with this when he adds, “If God is glorified in him, God has also glorified him in himself.” … Now, a man is not glorified in himself, nor, on the other hand, does God, who is glorified in the man, cease being God just because he receives glory.… “God is glorified in him” must certainly be referring either to Christ, who is glorified in the flesh, or to the Father, who is glorified in Christ. If it is Christ, Christ is clearly God who is glorified in the flesh. If it is the Father, we are face to face with the mystery of the unity, since the Father is glorified in the Son.… But when we consider that God glorifies in himself God who is glorified in the Son of man, by what loophole, pray tell, can your profane doctrine escape from the confession that Christ is very God according to the truth of his nature?… The Father glorifies him, not with a glory from without but in himself. By taking him back into that glory that belongs to himself and that [the Son] had with him before, the Father glorifies [the Son] with himself and in himself.
(Hom. lxxii. 2.) i. e. by Himself, not by any other. And shall straightway glorify Him, i. e. not at any distant time, but immediately, while He is yet on the very cross shall His glory appear. For the sun was darkened, rocks were rent, and many bodies of those that slept arose. In this way He restores the drooping spirits of His disciples, and persuades them, instead of sorrowing, to rejoice.
The time is near when the Son of man who was assumed will be glorified in a laudable way and in which, above all, God will be revealed before everybody through the things that happen to him. The events that happened at the time of the crucifixion, when the earth shook, the light of the sun was obscured, the darkness covered the earth, the sepulchers opened and the rocks were broken, showed how great was already—and how great would have been—the magnificence of the one who had been crucified. And, at the same time, they were the reason why people admired God who made the Son of man worthy of such an honor. “If God has been glorified in him, God will also glorify him in himself and will glorify him at once.” Evidently, he says, God is glorified by those things that are happening in him as much as he also glorifies him. It cannot happen that he appears to be admirable because of him if the things that happened to him were not great. And they, he says, had already been given to him.
But the glorifying of the Son of man, is the glorifying of God in Him; as He adds, And God is glorified in Him, which He proceeds to explain; If God is glorified in Him—for He came not to do His own will, but the will of Him that sent Him—God shall also glorify Him in Himself, so that the human nature which was assumed by the eternal Word, shall also be endowed with eternity. And shall straightway glorify Him. He predicts His own resurrection, which was to follow immediately, not at the end of the world, like ours. Thus it is; Now is the Son of man glorified; the now referring not to His approaching Passion, but the resurrection which was immediately to follow it: as if that which was so very soon to be, had already taken place.
But after saying, "Now is the Son of man glorified," He added, "and God is glorified in Him." For this is itself the glorifying of the Son of man, that God should be glorified in Him. For if He is not glorified in Himself, but God in Him, then it is He whom God glorifies in Himself. And just as if to give them this explanation, He further adds: "If God is glorified in Him, God shall also glorify Him in Himself." That is, "If God is glorified in Him," because He came not to do His own will, but the will of Him that sent Him; "and God shall glorify Him in Himself," in such wise that the human nature, in which He is the Son of man, and which was so assumed by the eternal Word, should also be endowed with an eternal immortality. "And," He says, "He shall straightway glorify Him;" predicting, to wit, by such an asseveration, His own resurrection in the immediate future, and not, as it were, ours in the end of the world. For it is this very glorification of which the evangelist had previously said, as I mentioned a little ago, that on this account the Spirit was not yet in their case given in that new way, in which He was yet to be given after the resurrection to those who believed, because that Jesus was not yet glorified: that is, mortality was not yet clothed with immortality, and temporal weakness transformed into eternal strength.
The traitor departs to minister to the stratagems of the devil. And now Christ begins His discourse; teaching us thereby, as in a figure, that the things which are fitted only for true disciples are not to be uttered in the hearing of all men. For it is not meet to give that which is holy unto the dogs, as Christ Himself says, nor even to allow pearls to be insulted by the feet of swine. The very same lesson that He had thus given them before in the form of a parable He now endeavours to teach them at a time requiring its practice, and calling for a more distinct explanation of it. So then, after the departure of the traitor and his hasty withdrawal from the house, Christ now, as at the fitting moment, unfolds the mysteries to His true disciples, saying: Now is the Son of Man glorified; and by this He is pointing to His sufferings as Saviour, as being already at the doors, and after but a brief while to come upon Him. He says, however, that "the Son of Man" is glorified, meaning none other than Himself; not implying a separation in Himself, as some have thought, for the Christ is one only Son both before and after His incarnation, as well after He became man like unto us as before He had become man. But we must now inquire what manner of glorification that is to which He now specially alludes; for some perhaps may say: Was He not surely glorified before this, by the mighty wonders which He wrought? Surely, when with a single word He rebuked the angry rage of the sea and checked the violence of the fierce winds, then He was worshipped by those that were in the boat, and heard them say: Of a truth Thou art the Son of God. Again, when He had bidden Lazarus at Bethany return once more to life, the marvellous deed was noised abroad, even so much that as He went up to Jerusalem at the time of the feast all the people together with their babes came forth to meet Him, and joined in the strain of wondrous praise addressed to Him, saying: Blessed is He that cometh in the name of the Lord. Nay, more, there was a time when He brake five loaves and two small fishes, and satisfied therewith the hunger of the multitude who had come together unto Him, amounting to five thousand men, besides babes and women. And to some the wonder then wrought seemed so magnificent that, astonished at the greatness of the achievement, they sought even to proclaim Him king; for this the Evangelist himself has testified to us. And there would be no difficulty in extending our argument at length by enumerating many other deeds wherein Christ's glory was manifested no less highly than in those we have just mentioned. How then, after all, does it happen that He Who had been glorified long before speaks of Himself as glorified at this particular time? Truly He had been glorified in other ways, and had won for Himself most distinctly a reputation for possessing Divine authority: still the perfect consummation of His glory and the fulness of His fame were summed up in the facts of His suffering for the life of the world and opening by His own resurrection the gate through which all may rise. For if we examine as well as we may the real character of the mystery of His work, we shall see that He died, not merely for Himself, nor even especially for His own sake; but that it was on behalf of humanity that He suffered and carried out both the suffering in itself and the resurrection that followed. For in that He died according to the flesh, He offered up His own life as an equivalent for the life of all; and by rendering perfect satisfaction for all, He fulfilled in Himself to the uttermost the force of that ancient curse. And in that He has risen again from the dead to a life imperishable and unceasing, in Himself He raises the whole of nature. For having died once for all, thenceforward, as it is written, He dieth no more; death no more hath dominion over Him. For the death that He died, He died unto sin once: but the life that He liveth, He liveth unto God. This also will for Christ's sake be true even in our own case. For we shall rise, no more subject to death, but endowed with endless life; even though there will be hereafter a great diversity of lot among those that rise----I mean as regards their glory and the recompence which each shall receive as due to his works. Christ therefore, after becoming obedient to God the Father even unto death, yea, the death of the cross, according to the saying of Paul, was once again highly exalted, receiving the name which is above every name. For He Who was believed to be a mere man was glorified very much beyond that, by being acknowledged as in very truth really God and the Son of God; not being promoted to a new dignity in possessing the Divine nature, but rather returning with His flesh to the full enjoyment of that very glory which was equally His before He took flesh. For this reason then we shall reckon that He was now glorified, although there never was a time when He was not Lord of glory. For in Christ we do not find one of His God-befitting attributes appearing as a new thing, but all appear as having naturally belonged to Him as God, even before the time when He is said to have emptied Himself. But still, when the form of a servant had been assumed, forasmuch as He raised Himself to those conditions again, even after He became man, He is conceived of as being "glorified," and is said to have "received" [the exalted name]. With Christ therefore in His glorification, God the Father also is greatly glorified. And He is glorified in the Son; not as receiving from His Offspring any addition of glory, for of no such addition does the Divine and ineffable nature stand ever in need; but because it is made known of what a Son He is the Father. For even as it is a pride and a glory to the Son to have such a Being for His Father, likewise also methinks it is a pride and a glory even to the Father to have born from Himself so glorious a Son. Therefore Christ says this: And God is glorified in Him; and God shall glorify Him in Himself, and straightway shall He glorify Him: for at the same time the Father is glorified on account of the Son, and straightway glorifies the Son in return. For to Both, for the sake of Both, the ascription of glory extends.
But in order that we may bring down the application of the passage to our own level, and so make it a source of edification to our hearers, we will add this to what has been said. If in ourselves we glorify God, we may expect that we shall be glorified by Him. For, As I live, saith the Lord, them that honour Me I will honour, and they shall not be lightly esteemed. And God is glorified by us and in us, when, casting away the defilement of sin, we adorn our lives in all the beauty of good works. For thus it is that we live to His glory.
[AD 367] Hilary of Poitiers on John 13:31-32