3 Who is the Physician? Our Lord Jesus Christ. Who is our Lord Jesus Christ? He who was seen even by those by whom He was crucified. He who was seized, buffeted, scourged, spit upon, crowned with thorns, suspended upon the cross, died, pierced by the spear, taken down from the cross, laid in the sepulchre. That same Jesus Christ our Lord, that same Jesus exactly, He is the complete Physician of our wounds. That crucified One at whom insults were cast, and while He hung on the cross His persecutors wagging the head, and saying, “If he be the Son of God, let him come down from the cross,” — He, and no other, is our complete Physician.
Wherefore, then, did He not show to his deriders that He was the Son of God; so that if He allowed Himself to be lifted up upon the cross, at least when they said, “If he be the Son of God, let him come down from the cross,” He should then come down, and show to them that He was the very Son of God whom they had dared to deride? He would not. Wherefore would He not? Was it because He could not? Manifestly He could. For which is greater, to descend from the cross or to rise from the sepulchre?
But He bore with His insulters; for the cross was taken not as a proof of power, but as an example of patience. There He cured your wounds, where He long bore His own; there He healed you of death eternal, where He vouchsafed to die the temporal death. And did He die, or in Him did death die? What a death was that, which slew death!
Source: Tractates on the Gospel of John (New Advent)