Wilt thou do that for Me, which I have not done yet for thee? Canst thou go before, who canst not come after? Why presumest thou so? Hear what thou art: Verily, verily, I say unto thee, The cock shall not crow, till thou hast denied Me thrice. Thou who promisest Me thy death, shall thrice deny thy life. Peter knew his great desire, his strength he knew not: he boasted of his will, while he was yet weak; but the Physician saw his weakness. (c. 2.). Some who perversely favour Peter, excuse him, and say that he did not deny Christ, because when asked by the servant maid, he said he did not know Him, as the other Evangelists witness more expressly. As if to deny the man Christ, was not to deny Christ; yea, that in Christ, which He was made for our sakes, that that which He made us, might not perish. By what is He the Head of the Church, but by His humanity? And how then is he in the body of Christ, who denies the man Christ? But why do I argue so long? Our Lord does not say, The cock shall not crow till thou deniest man, or the Son of man, but till thou deniest Me. What is Me, but that which He was? So then whatever Peter denied, he denied Christ: it is impious to doubt it. Christ said so, and Christ said true: beyond a doubt, Peter denied Christ. Let us not, to defend Peter, accuse Christ. The frailty of Peter himself, acknowledged its sin, when he witnessed by his tears the evil he had done in denying Christ. Nor do we say this, because we have pleasure in blaming the first of the Apostles; but that we may take warning from him, not to be confident of our own strength.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Tr. lxvi. 1