John 17:22

(viii. de Trin) By this giving and receiving of honour, then, all are one. But I do not yet apprehend in what way this makes all one. Our Lord, however, explains the gradation and order in the consummating of this unity, when He adds, I in them, and Thou in Me; so that inasmuch as He was in the Father by His divine nature, we in Him by His incarnation, and He again in us by the mystery of the sacrament, a perfect union by means of a Mediator was established.

"And the glory which Thou gavest Me, I have given them." That by miracles, that by doctrines, and, that they should be of one soul; for this is glory, that they should be one, and greater even than miracles. As men admire God because there is no strife or discord in That Nature, and this is His greatest glory, "so too let these," He saith, "from this cause become glorious." "And how," saith some one, "doth He ask the Father to give this to them, when He saith that He Himself giveth it?" Whether His discourse be concerning miracles, or unanimity, or peace, He is seen Himself to have given these things to them; whence it is clear that the petition is made for the sake of their comfort.

Furthermore, our Saviour in thus praying to the Father showed Himself to be man; while He now also shows that He Himself, as being God along with the Father, doeth that which He prayeth for, when He says, "And the glory which Thou gavest me, I have given them." And what was that glory but immortality, which human nature was henceforth to receive in Him? For not even He Himself had as yet received it, but in His own customary way, on account of the absolute fixedness of predestination, He intimates what is future in verbs of the past tense, because being now on the point of being glorified, or in other words, raised up again by the Father, He Himself is going to raise us up to the same glory in the end. What we have here is similar to what He says elsewhere, "As the Father raiseth up the dead, and quickeneth them, even so the Son quickeneth whom He will." And "whom," but just the same as the Father? "For what things soever the Father doeth," not other things, but "these also doeth the Son," not in a different way, but "in like manner." And in this way He also raised up even His own self. For to this effect he said, "Destroy this temple, and in three days I will raise it up again." Accordingly the glory of immortality, which He says had been given Him by the Father, He must be also understood as having bestowed upon Himself, although He does not say it. For on this very account He more frequently says that the Father alone doeth, what He Himself also doeth along with the Father, that everything whatever He may attribute to Him of whom He is.

(Tr. cx) Then our Saviour, Who, by praying to the Father, showed Himself to be man, now shows that, being God with the Father, He doth what He prays for: And the glory which Thou gavest Me, I have given them. What glory, but immortality, which human nature was about to receive in Him? For that which was to be by unchangeable predestination, though future, He expresses by the past tense. That glory of immortality, which He says was given Him by the Father, we must understand He gave Himself also. For when the Son is silent of His own cooperation in the Father's work, He shows His humility: when He is silent of the Father's cooperation in His work, He shows His equality. In this way here He neither disconnects Himself with the Father's work, when He says, The glory which Thou gavest Me, nor the Father with His work, when He says, I have given them. But as He was pleased by prayer to the Father to obtain that all might be one, so now He is pleased to effect the same by His own gift; for He continues, That all may be one, even as We are one.