15 Simon Peter and another disciple followed Jesus. That other disciple was known to the Chief Priest, and so he went in with Jesus to the Chief Priest's courtyard. 16 Peter had to stay outside. Then the other disciple went out, spoke to the doorkeeper, and got Peter in. 17 The young woman who was the doorkeeper said to Peter, "Aren't you one of this man's disciples?" He said, "No, I'm not." 18 The servants and police had made a fire because of the cold and were huddled there warming themselves. Peter stood with them, trying to get warm.
Matthew Henry's Commentary on John 18:15-18
Commentary on John 18:13-27
(Read John 18:13-27)
Simon Peter denied his Master. The particulars have been noticed in the remarks on the other Gospels. The beginning of sin is as the letting forth of water. The sin of lying is a fruitful sin; one lie needs another to support it, and that another. If a call to expose ourselves to danger be clear, we may hope God will enable us to honour him; if it be not, we may fear that God will leave us to shame ourselves. They said nothing concerning the miracles of Jesus, by which he had done so much good, and which proved his doctrine. Thus the enemies of Christ, whilst they quarrel with his truth, wilfully shut their eyes against it. He appeals to those who heard him. The doctrine of Christ may safely appeal to all that know it, and those who judge in truth bear witness to it. Our resentment of injuries must never be passionate. He reasoned with the man that did him the injury, and so may we.