John 18:15

"And Simon Peter followed Jesus, and so did another disciple." Who is that other disciple? It is the writer himself. "And wherefore doth he not name himself? When he lay on the bosom of Jesus, he with reason concealed his name; but now why doth he this?" For the same reason, for here too he mentions a great good deed, that when all had started away, he followed. Therefore he conceals himself, and puts Peter before him. He was obliged to mention himself, that thou mightest understand that he narrates more exactly than the rest what took place in the hall, as having been himself within. But observe how he detracts from his own praise; for, lest any one should ask, "How, when all had retreated, did this man enter in farther than Simon?" he saith, that he "was known to the high priest." So that no one should wonder that he followed, or cry him up for his manliness. But the wonder was that matter of Peter, that being in such fear, he came even as far as the hall, when the others had retreated.

His coming thither was caused by love, his not entering within by distress and fear. For the Evangelist hath recorded these things, to clear a way for excusing his denial; with regard to himself, he doth not set it down as any great matter that he was known to the high priest, but since he had said that he alone with Jesus went in, lest thou shouldest suppose that the action proceeded from any exalted feelings, he puts also the cause.

"But Jesus was followed," he says, "by Simon Peter, and another disciple." Who that other disciple is, we cannot affirm with confidence, because it is left unnoticed here. But it is in this way that John usually refers to himself, with the addition, "whom Jesus loved." Perhaps, therefore, it is he also in the present case; but whoever it is, let us look at what follows. "And that disciple," he says, "was known unto the high priest, and went in with Jesus into the palace of the high priest; but Peter stood at the door without. Then went out that other disciple, who was known unto the high priest, and spake unto her that kept the door, and brought in Peter. Then saith the damsel that kept the door unto Peter, Art thou also one of this man's disciples? He saith, I am not." Lo, the pillar of greatest strength has at a single breath of air trembled to its foundations. Where is now all that boldness of the promiser, and his overweening confidence in himself beforehand? What now of those words, when he said, "Why cannot I follow Thee now? I will lay down my life for Thy sake." Is this the way to follow the Master, to deny his own discipleship? is it thus that one's life is laid down for the Lord, when one is frightened at a maid-servant's voice, lest it should compel us to the sacrifice? But what wonder, if God foretold what was true, and man presumptuously imagined what was false? Assuredly in this denial of the Apostle Peter, which had now entered on its first stage, we ought to take notice that not only is Christ denied by one who says that He is not Christ, but by him also who, while really a Christian, himself denies that he is so. For the Lord said not to Peter, Thou shall deny that thou art my disciple; but, "Thou shall deny me." Him, therefore, he denied, when he denied that he was His disciple. And what else did such a form of denial imply, but that of his own Christianity?

(de Con. Evang. iii. vi) The temptation of Peter, which took place in the midst of the contumelies offered to our Lord, is not placed by all in the same order. Matthew and Mark put the contumelies first, the temptation of Peter afterwards; Luke the temptation first, the contumelies after. John begins with the temptation: And Simon Peter followed Jesus, and so did another disciple. (Tr. cxiii) Who that other disciple was we cannot hastily decide, as his name is not told us. John however is wont to signify himself by this expression, with the addition of, whom Jesus loved. Perhaps therefore he is the one.

He followed his Master out of devotion, though afar off, on account of fear.