John 17:5

And now, O Father, glorify thou me with thine own self,.... Not with his perfections, these he had, they dwelt bodily in him; or with his nature, in which he was one with him; but as Mediator, with his glorious presence in heaven, by setting him at his right hand, and crowning him with glory and honour. The Jews have a notion that God will give to the King Messiah, מן הכבוד של מעלה, "of the supreme glory" g: the glory Christ prays for is, as he says,

the glory which I had with thee before the world was; the same phrase with לעולם, or קודם העולם, used by the Jews h. This is not to be understood of the glory of the human nature of Christ, abstractly considered; for that is no person of itself, but what is taken up into personal union with the Son of God; and therefore cannot be intended by this personal character I; nor did it exist from eternity; it was indeed written in God's book of predestination, even all its members, when as yet there were none of them in actual being; it was set up in God's thoughts and counsel, as the pattern and exemplar of human nature; it had a federal union with the Son of God, or a covenant subsistence with him; and in the Old Testament Christ was often spoken of as man, because of his frequent appearances in an human form, and because of the certainty of his incarnation; but he did not really and actually exist as man, until he took flesh of the virgin; for Christ, as man, is the seed of the woman, the son of David, Abraham, and Adam; he is called the last and second Adam, and was not as man before the first: the Old Testament speaks of his incarnation as future, nor is it possible that a creature can exist before time; for as soon as a creature exists, time begins, which is nothing else than the measure of a creature's duration; nor was the human nature of Christ with the Father from eternity; nor had it a glory before the world began, neither in whole, nor in part: nor is the glory of the divine nature abstractly considered here meant; this glory indeed Christ had from everlasting; he had it with his Father, in common with him, being in union to him; and it is true that it was in some measure veiled and covered in his state of humiliation; for though there were some breakings forth of it in that state, these were seen but by a few; wherefore he is thought by some, to pray here for the manifestation of this glory; but this glory was essential to him, was his natural right, and not to be prayed for, and which he then had as much as ever, and of which there could be no suspension: but this designs the glory of him as Godman, and Mediator; he was not only predestinated to be a Mediator, but was really set up as such from everlasting, and had a mediatorial fulness of grace put into his hands, and had the honour and glory of that office given unto him by the other two persons; and now that he might appear to be what he was, to be made, that is, made manifest that he was both Lord and Christ, he here prays; which was to be done, upon his ascension to heaven, and session at the right hand of God, by the pouring down of the Holy Ghost.

g Midrash Tillim in Psal. 20 apud Galatin. de Arcan. Cathol. Ver. l. 3. c. 9. h Gloss in T. Bab Pesachim, fol. 54. 1.