Augustine of Hippo — as excerpted in the Catena Aurea on John 6:35-40

“(Tr. xxv. 15) This is the reason why He does not cast out those who come to Him. For I came down from heaven not to do Mine own will, but the will of Him that sent Me. The soul departed from God, because it was proud. Pride casts us out, humility restores us. When a physician in the treatment of a disease, cures certain outward symptoms, but not the cause which produces them, his cure is only temporary. So long as the cause remains, the disease may return. That the cause then of all diseases, i. e. pride, might be eradicated, the Son of God humbled Himself. Why art thou proud, O man? The Son of God humbled Himself for thee. It might shame thee, perhaps, to imitate a humble man; but imitate at least a humble God. And this is the proof of His humility: I came not to do Mine own will, but the will of Him that sent Me. Pride does its own will; humility the will of God.”