John Chrysostom
Catena Aurea · Matthäusevangelium 26
And when they had sung an hymn, they went out into the mount of Olives. Then saith Jesus unto them, All ye shall be offended because of me this night; for it is written, I will smite the shepherd, and the sheep of the flock shall be scattered abroad. But after I am risen again, I will go before you into Galilee. Peter answered and said unto him, Though all men shall be offended because of thee, yet will I never be offended. Jesus said unto him, Verily I say unto thee, That this night, before the cock crow, thou shalt deny me thrice. Peter said unto him, Though I should die with thee, yet will I not deny thee. Likewise also said all the disciples.
[I suppose also that Peter fell into these words through ambition and boastfulness. And they had disputed at supper which of them should be greatest, whence we see that the love of empty glory disturbed them much. And so to deliver him from such passions, Christ withdrew His aid from him. Moreover observe how after the resurrection, taught by his fall he speaks to Christ more humbly, and does not any more resist His words. All this his fall wrought for him; for before he had attributed all to himself, when he ought rather to have said, I will not deny Thee if Thou succour me with Thy aid. But afterwards he shews that every thing is to be ascribed to God; Why look ye so earnestly upon us, as though by our own power and holiness we had made this man to walk?]q (Act 3:12.) Hence then we learn the great doctrine, that man’s wish is not enough, unless he enjoys Divine support.