Christ had said to him, Thou canst not follow me now (John 13:36). Peter was not in a proper state to follow Christ, because he had not been brought to the end of himself; he did not know himself, and he therefore could not follow Christ. But when he went out and wept bitterly, then came the great change. Christ previously said to him, When thou art converted, strengthen Your brethren (Luke 22:32). As Peter wept bitterly, he reached the point where he was converted from self to Christ.