But Peter, in the ardour of his zeal, made profession of steadfastness and endurance to the last extremity, saying that he would manfully resist the terrors of death, and count nothing of bonds; but in so doing he erred from what was right. For he ought not, when the Saviour told him that he would prove weak to have contradicted Him, loudly protesting the contrary; for the Truth could not lie: but rather he ought to have asked strength of Him, that either he might not suffer this, or be rescued immediately from harm. But, as I have already said, being fervent in spirit, and warm in his love towards Christ, and of unrestrainable zeal in rightly performing those duties which become a disciple in his attendance upon his Master, he declares that he will endure to the last extremity: but he was rebuked for foolishly speaking against what was foreknown, and for his unreasonable haste in contradicting the Saviour's words. For this reason He says, "Verily I tell you, that the cock shall not crow to-night, until you have thrice denied Me." And this proved true. Let us not therefore think highly of ourselves, even if we see ourselves greatly distinguished for our virtues: rather let us offer up the praises of our thanksgivings to Christ Who redeems us, and Who also it is that grants us even the desire to be able to act rightly: by Whom and with Whom to God the Father be praise and dominion, with the Holy Spirit, for over and ever, Amen.
Cyril of Alexandria, Commentary on Luke, Sermon CXLIV.
