John 17:5

5.The glory which I had with thee. He desires to be glorified with the Father, not that the Father may glorify him secretly, without any witnesses, but that, having been received into heaven, he may give a magnificent display of his greatness and power, that every knee may bow to him, (Philippians 2:10.) Consequently, that phrase in the former clause, with the Father, is contrasted with earthly and fading glory, as Paul describes the blessed immortality of Christ, by saying that

he died to sin once, but now he liveth to God, (Romans 6:10.)

The glory which I had with thee before the world was. He now declares that he desires nothing that does not strictly belong to him, but only that he may appear in the flesh, such as he was before the creation of the world; or, to speak more plainly, that the Divine majesty, which he had always possessed, may now be illustriously displayed in the person of the Mediator, and in the human flesh with which he was clothed. This is a remarkable passage, which teaches us that Christ is not a God who has been newly contrived, or who has existed only for a time; for if his glory was eternal, himself also has always been. Besides, a manifest distinction between the person of Christ and the person of the rather is here expressed; from which we infer, that he is not only the eternal God, but also that he is the eternal Word of God, begotten by the rather before all ages.