Luke 22:56

What meaneth it, that a maid is the first to betray Peter, whereas surely men ought the more easily to have recognised him, save that that sex should be plainly implicated in our Lord's murder, in order that it might also be redeemed by His Passion? But Peter when discovered denies, for better that Peter should have denied, than our Lord's word should have failed. Hence it follows, And he denied, saying, Woman, I know him not.

(ut sup.) What ails thee, Peter, thy voice is suddenly changed? That mouth full of faith and love, is turned to hatred and unbelief. Not yet awhile is the scourge applied, not yet the instruments of torture. Thy interrogator is no one of authority, who might cause alarm to the confessor. The mere voice of a woman asks the question, and she perhaps not about to divulge thy confession, nor yet a woman, but a door-keeper, a mean slave.

(App. Serm. 79.) For to Peter were delivered the keys of the kingdom of heaven, to him were entrusted an innumerable multitude of people, who were wrapped up in sin. But Peter was somewhat too vehement, as the cutting off the car of the High Priest's servant betokens. If he then who was so stern and so severe had obtained the gift of not sinning, what pardon would he have given to the people committed to him? Therefore Divine Providence suffers him first to be holden of sin, that by the consciousness of his own fall he might soften his too harsh judgment towards sinners. When he wished to warm himself at the fire, a maid came to him, of whom it follows, But a certain maid beheld him, &c.