15 And Simon Peter went after Jesus with another disciple. Now that disciple was a friend of the high priest and he went in with Jesus into the house of the high priest; 16 But Peter was kept outside at the door. Then this other disciple, who was a friend of the high priest, came out and had a word with the girl who kept the door, and took Peter in. 17 Then the girl who was the door-keeper said to Peter, Are you not one of this man's disciples? In answer he said, I am not. 18 Now the servants and the police had made a fire of coals because it was cold; they were warming themselves in front of it and Peter was there with them, warming himself.
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.