John 17:5

"And now, O Father, glorify Thou Me with Thine Own Self, with the glory which I had with Thee before the world was." Where is that glory? For allowing that He was with reason unhonored among men, because of the covering which was put around Him; how seeketh He to be glorified with the Father? What then saith He here? The saying refers to the Dispensation; since His fleshly nature had not yet been glorified, not having as yet enjoyed incorruption, nor shared the kingly throne. Therefore He said not "on earth," but "with Thee."

The splendid glory of the Son of God—what else would it be other than the divine Word himself, the "true Light" itself? He is not glorified by another glory through the agency of another person as if he were someone else other than the glory. No, he is himself the "Lord of glory" and King of glory, as I said previously. But since "he emptied himself, taking the form of a servant"—for he says, "the Word became flesh" and "we saw him" and "he did not have any comeliness or beauty"66—and many did not believe that this descent had taken place, since many did not believe that God became man to reveal his divinity to those who had not recognized him, he said, "Father, glorify your Son," that is, "reveal me to those who have not recognized me, manifest my glory that I had with you as the divine Word." Therefore, Paul says, "God considered it good to reveal his Son to me, so that I might proclaim him among the Gentiles."

But what is this glory with the Father, for which He looks? It is that, of course, which He had with Him before the world was. He had the fulness of the Godhead; He has it still, for He is God's Son. But He Who was the Son of God had become the Son of man also, for The Word was made flesh. He had not lost His former being, but He had become what He was not before; He had not abdicated His own position, yet He had taken ours; He prays that the nature which He had assumed may be promoted to the glory which He had never renounced. Therefore, since the Son is the Word, and the Word was made flesh, and the Word was God, and was in the beginning with God, and the Word was Son before the foundation of the world; this Son, now incarnate, prayed that flesh might be to the Father what the Son had been. He prayed that flesh, born in time, might receive the splendour of the everlasting glory, that the corruption of the flesh might be swallowed up, transformed into the power of God and the purity of the Spirit.