Augustine of Hippo
Catena Aurea · Matthäusevangelium 26
And he went a little farther, and fell on his face, and prayed, saying, O my Father, if it be possible, let this cup pass from me: nevertheless not as I will, but as thou wilt. And he cometh unto the disciples, and findeth them asleep, and saith unto Peter, What, could ye not watch with me one hour? Watch and pray, that ye enter not into temptation: the spirit indeed is willing, but the flesh is weak. He went away again the second time, and prayed, saying, O my Father, if this cup may not pass away from me, except I drink it, thy will be done. And he came and found them asleep again: for their eyes were heavy. And he left them, and went away again, and prayed the third time, saying the same words.
(in Ps. 32. enar. 2.) Christ thus as man shews a certain private human will, in which He who is our head figures both His own will and ours when He says, Let it pass from me. For this was His human will choosing something as apart for Himself. But because as man He would be righteous and guide Himself by God’s will, He adds, Nevertheless not as I will, but as thou wilt; as much as to say to us, Man, behold thyself in Me, that thou canst will somewhat apart of thyself, and though God’s will is other, this is permitted to human frailty.