John 17:4

But God is first of all glorified here, while He is being made known to men by word of mouth, and preached through the faith of believers. Wherefore, He says, "I have glorified Thee on the earth: I have finished the work which Thou gavest me to do." He does not say, Thou orderedst; but, "Thou gavest:" where the evident grace of it is commended to notice. For what has the human nature even in the Only-begotten, that it has not received? Did it not receive this, that it should do no evil, but all good things, when it was assumed into the unity of His person by the Word, by whom all things were made? But how has He finished the work which was committed unto Him to do, when there still remains the trial of the passion wherein He especially furnished His martyrs with the example they were to follow, whereof, says the apostle Peter, "Christ suffered for us, leaving us an example, that we should follow His steps:" but just that He says He has finished, what He knew with perfect certainty that He would finish? Just as long before, in prophecy, He used words in the past tense, when what He said was to take place very many years afterwards: "They pierced," He says, "my hands and my feet, they counted all my bones;" He says not, They will pierce, and, They will count. And in this very Gospel He says, "All things that I have heard of my Father, I have made known unto you;" to whom He afterward declares, "I have yet many things to say unto you, but ye cannot bear them now." For He, who has predestinated all that is to be by sure and unchangeable causes, has done whatever He is to do: as it was also declared of Him by the prophet, "Who hath made the things that are to be."

(Tr. cv) But God is first glorified here, when He is proclaimed, made known to, and believed in, by men: I have glorified Thee on the earth. (Tr. cv) Not Thou commandest Me, but, Thou gavest Me, implying evidently grace. For what hath human nature, even in the Only-Begotten, what it hath not received? But how had He finished the work which had been given Him to do, when there yet remained His passion to undergo? He says He has finished it, i. e. He knows for certain that He will. (Tr. cv. 5) He had said above, Father, the hour is come; glorify Thy Son, that Thy Son also may glorify Thee: the order of which words shows that the Son was first to be glorified by the Father, that the Father might be glorified by the Son. But now He says, I have glorified Thee; and now glorify Me; as if He had first glorified the Father, and then asked to be glorified by Him. We must understand that the first is the order in which one was to succeed the other, but that He afterwards uses a past tense, to express a thing future; the meaning being, I will glorify Thee on the earth, by finishing the work Thou hast given Me to do: and now, Father, glorify Me, which is quite the same sentence with the first one, except that He adds here the mode in which He is to be glorified; with the glory which I had before the world was, with Thee. The order of the words is, The glory which I had with Thee before the world was. This has been taken by some to mean, that the human nature which was assumed by the Word, would be changed into the Word, that man would be changed into God, or, to speak more correctly, be lost in God. For no one would say that the Word of God would by that change be doubled, or even made at all greater. […]

In a way similar, also, to this, He proceeds to say: "And now, O Father, glorify thou me with Thine own self with the glory which I had with Thee before the world was." For He had said above, "Father, the hour is come; glorify Thy Son, that Thy Son may glorify Thee:" in which arrangement of the words He had shown that the Father was first to be glorified by the Son, in order that the Son might glorify the Father. But now He said, "I have glorified Thee on the earth: I have finished the work which Thou gavest me to do; and now glorify Thou me;" as if He Himself had been the first to glorify the Father, by whom He then demands to be glorified. We are therefore to understand that He used both words above in accordance with that which was future, and in the order in which they were future, "Glorify Thy Son, that Thy Son may glorify Thee:" but that He now used the word in the past tense of that which was still future, when He said, "I have glorified Thee on the earth: I have finished the work which Thou gavest me to do." And then, when He said, "And now, O Father, glorify Thou me with Thine own self," as if He were afterwards to be glorified by the Father, whom He Himself had first glorified; what did He intimate but that, when He said above, "I have glorified Thee on the earth," He had so spoken as if He had done what He was still to do; but that here He demanded of the Father to do that whereby the Son should yet do so; in other words, that the Father should glorify the Son, by means of which glorification of the Son, the Son also was yet to glorify the Father?

(iii. de Trin) This new glory with which our Lord had glorified the Father, does not imply any advancement in Godhead, but refers to the honour received from those who are converted from ignorance to knowledge. (ix. de Trin) After which, that we may understand the reward of His obedience, and the mystery of the whole dispensation, He adds, And now glorify Me with the glory with Thine own Self, with the glory which I had with Thee before the world was. (iii. de Trin) Or He prayed that that which was mortal, might receive the glory immortal, that the corruption of the flesh might be transformed and absorbed into the incorruption of the Spirit.

But the Holy Spirit does not speak His own things, but those of Christ, and that not from himself, but from the Lord; even as the Lord also announced to us the things that He received from the Father. For, says He, "the word which ye hear is not Mine, but the Father's, who sent Me." And says He of the Holy Spirit, "He shall not speak of Himself, but whatsoever things He shall hear from Me." And He says of Himself to the Father, "I have," says He, "glorified Thee upon the earth; I have finished the work which, Thou gavest Me; I have manifested Thy name to men." And of the Holy Ghost, "He shall glorify Me, for He receives of Mine."