John 17:4-5

John 17:4-5. I have glorified thee on the earth: I have finished the work which thou gavest me to do. And now, O Father, glorify thou me with thine own self with the glory which had with thee before the world was.

As Christ had carried out his Father’s will, and done the work he had been sent to do, he was but right that he should go back to the glory which he had for a season voluntarily laid aside. You notice that, although he had not then died upon the cross, he was certain that be would there complete his great mediatorial work that he spoke of it as being already "finished."