69 All this time, Peter was sitting out in the courtyard. One servant girl came up to him and said, "You were with Jesus the Galilean." 70 In front of everybody there, he denied it. "I don't know what you're talking about." 71 As he moved over toward the gate, someone else said to the people there, "This man was with Jesus the Nazarene." 72 Again he denied it, salting his denial with an oath: "I swear, I never laid eyes on the man." 73 Shortly after that, some bystanders approached Peter. "You've got to be one of them. Your accent gives you away." 74 Then he got really nervous and swore. "I don't know the man!"
Matthew Henry's Commentary on Matthew 26:69-74
Commentary on Matthew 26:69-75
(Read Matthew 26:69-75)
Peter's sin is truly related, for the Scriptures deal faithfully. Bad company leads to sin: those who needlessly thrust themselves into it, may expect to be tempted and insnared, as Peter. They scarcely can come out of such company without guilt or grief, or both. It is a great fault to be shy of Christ; and to dissemble our knowledge of him, when we are called to own him, is, in effect, to deny him. Peter's sin was aggravated; but he fell into the sin by surprise, not as Judas, with design. But conscience should be to us as the crowing of the cock, to put us in mind of the sins we had forgotten. Peter was thus left to fall, to abate his self-confidence, and render him more modest, humble, compassionate, and useful to others. The event has taught believers many things ever since, and if infidels, Pharisees, and hypocrites stumble at it or abuse it, it is at their peril. Little do we know how we should act in very difficult situations, if we were left to ourselves. Let him, therefore, that thinketh he standeth, take heed lest he fall; let us all distrust our own hearts, and rely wholly on the Lord. Peter wept bitterly. Sorrow for sin must not be slight, but great and deep. Peter, who wept so bitterly for denying Christ, never denied him again, but confessed him often in the face of danger. True repentance for any sin will be shown by the contrary grace and duty; that is a sign of our sorrowing not only bitterly, but sincerely.