"Father, glorify your son that your son may glorify you"
There are some people who think that the Son was glorified by the Father in that he did not spare him but delivered him up for us all (Rm 8:32). But if he was glorified in his Passion, how much more in his Resurrection! In his Passion his humility appeared more than his splendor... So that "the mediator between God and man, the man Christ Jesus" (1Tim 2:5), should be glorified in his resurrection, he was first of all humbled in his Passion... Let no Christian have any doubt about it: clearly the Son has been glorified in the form of the slave that the Father has raised up and seated at his right hand (Phil 2:7; Acts 2:34).
But our Lord did not just say: "Father, glorify your Son", he added: "that your Son might glorify you". Very rightly, then, we ask how it was that the Son glorified the Father... In fact the Father's glory, in itself, can neither grow nor diminish. Nevertheless, it was less so amongst us when God was only known "in Judah" and his servants did not "praise the name of the Lord from the rising of the sun to its setting" (Ps 76[75]:2; 113[112]:1-3). This was brought about by the Gospel of Christ, which made the Father known to all nations by the Son: this is how the Son glorified the Father.
If the Son had done nothing but die and was not raised up again he would not have been glorified by the Father, nor the Father by him. But now, glorified by the Father in his resurrection, he glorifies the Father by the preaching of his resurrection. This is manifest in the very order of words: "Father, glorify your Son that your Son may glorify you", as though he were saying: "Raise me up so that, through me, you may be made known to the whole world"... Even in this life God is glorified when our preaching makes him known to others and when he is preached through the faith of those who believe in him.
St. Paul of the Cross