The text for Good Friday is always John 18-19. Jesus makes clear throughout John's gospel that the cross is the hour which he will be glorified. Eugene Peterson writes about how difficult that is for us to get our heads around.

"Jesus takes the brightest word in our vocabularies and plunges it into the darkest pit of experience, violent and excruciating death. Everything we ever associated with glory has to be recast: We have entered a mystery. ... But not a total mystery. Every gardener knows something of this: each spring we bury seeds in our gardens and in a few weeks enjoy the bloom of flowers and the nourishment of vegetables."
Eugene Peterson. Christ Plays in Ten Thousand Places.

A dread and marvelous mystery we see come to pass this day. He whom none may touch is seized; He who looses Adam from the curse is bound. He who tries the hearts and inner thoughts of man is unjustly brought to trial. He who closed the abyss is shut in prison. He before whom the powers of heaven stand with trembling, stands before Pilate; the Creator is struck by the hand of His creature. He who comes to judge the living and the dead is condemned to the Cross; the Destroyer of hell is enclosed in a tomb. O Thou who dost endure all these things in Thy tender love, who hast saved all men from the curse, O long-suffering Lord, glory to Thee.