John 1:42

And behold, I beg of you, the mind of Peter obedient and tractable from the very beginning; he ran to Him without any delay; "He brought him," saith St. John, "to Jesus." Yet let no one blame his easy temper if he received the word without much questioning, because it is probable that his brother had told him these things more exactly and at length; but the Evangelists from their care for conciseness constantly cut many things short. Besides, it is not said absolutely that "he believed," but that "he brought him to Jesus," to give him up for the future to Him, so that from Him he might learn all; for the other disciple also was with him, and contributed to this. And if John the Baptist, when he had said that He was "the Lamb," and that He "baptized with the Spirit," gave them over to learn the clearer doctrine concerning this thing from Him, much more would Andrew have done this, not deeming himself sufficient to declare the whole, but drawing him to the very fount of light with so much zeal and joy, that the other neither deferred nor delayed at all.

"And when Jesus beheld him," saith the Evangelist, "He said, Thou art Simon, the son of Jonas; thou shalt be called Cephas, which is, by interpretation, a stone." He begins from this time forth to reveal the things belonging to His Divinity, and to open It out little by little by predictions. So He did in the case of Nathaniel and the Samaritan woman. For prophecies bring men over not less than miracles; and are free from the appearance of boasting. Miracles may possibly be slandered among foolish men, ("He casteth out devils," said they, "by Beelzebub"), but nothing of the kind has ever been said of prophecy. Now in the case of Nathaniel and Simon He used this method of teaching, but with Andrew and Philip He did not so. Why was this? Because those (two) had the testimony of John, no small preparation, and Philip received a credible evidence of faith, when he saw those who had been present. "Thou art Simon, the son of Jonas." By the present, the future is guaranteed; for it is clear that He who named Peter's father foreknew the future also. And the prediction is attended with praise; but the object was not to flatter, but to foretell something future.

But Peter makes no reply to these words; as yet he knew nothing clearly, but still was learning. And observe, that not even the prediction is fully set forth; for Jesus did not say, "I will change thy name to Peter, and upon this rock I will build My Church," but, "Thou shalt be called Cephas." The former speech would have expressed too great authority and power; for Christ does not immediately nor at first declare all His power, but speaks for a while in a humbler tone; and so, when He had given the proof of His Divinity, He puts it more authoritatively, saying, "Blessed art thou, Simon, because My Father hath revealed it to thee"; and again, "Thou art Peter, and upon this rock I will build My Church." Him therefore He so named, and James and his brother He called "sons of thunder." Why then doth He this? To show that it was He who gave the old covenant, that it was He who altered names, who called Abram "Abraham," and Sarai "Sarah," and Jacob "Israel." To many he assigned names even from their birth, as to Isaac, and Samson, and to those in Isaiah and Hosea; but to others He gave them after they had been named by their parents, as to those we have mentioned, and to Joshua the son of Nun. It was also a custom of the Ancients to give names from things, which in fact Leah also has done; and this takes place not without cause, but in order that men may have the appellation to remind them of the goodness of God, that a perpetual memory of the prophecy conveyed by the names may sound in the ears of those who receive it. Thus too He named John early, because they whose virtue was to shine forth from their early youth, from that time received their names; while to those who were to become great at a later period, the title also was given later.

(Tr. vii. c. 14) There was nothing very great in our Lord saying whose son he was, for our Lord knew the names of all His saints, having predestinated them before the foundation of the world. But it was a great thing for our Lord to change his name from Simon to Peter. Peter is from petra, rock, which rock is the Church: so that the name of Peter represents the Church. And who is safe, unless he build upon a rock? Our Lord here rouses our attention: for had he been called Peter before, we should not have seen the mystery of the Rock, and should have thought that he was called so by chance, and not providentially. God therefore made him to be called by another name before, that the change of that name might give vividness to the mystery. (de Con. Evang. l. ii. c. 17) The account here of the two disciples on the Jordan, who follow Christ (before he had gone into Galilee) in obedience to John's testimony; viz. of Andrew bringing his brother Simon to Jesus, who gave him, on this occasion, the name of Peter; disagrees considerably with the account of the other Evangelists, viz. that our Lord found these two, Simon and Andrew, fishing in Galilee, and then bid them follow Him: unless we understand that they did not regularly join our Lord when they saw Him on the Jordan; but only discovered who He was, and full of wonder, then returned to their occupations. Nor must we think that Peter first received his name on the occasion mentioned in Matthew, when our Lord says, Thou art Peter, and upon this rock will I build My Church; (Mat. 16:18) but rather when our Lord says, Thou shall be called Cephas, which is by interpretation, A stone.

"And he brought him to Jesus; and when Jesus beheld him, He said, Thou art Simon the son of Joannes: thou shalt be called Cephas, which is, by interpretation, Peter." It is not a great thing that the Lord said whose son Peter was. What is great to the Lord? He knew all the names of His own saints, whom He predestinated before the foundation of the world; and dost thou wonder that He said to one man, Thou art the son of this man, and thou shalt be called this or that? Is it a great matter that He changed his name, and converted it from Simon to Peter? Peter is from petra, a rock, but the petra [rock] is the Church; in the name of Peter, then, was the Church figured. And who is safe, unless he who builds upon the rock? And what saith the Lord Himself? "He that heareth these my words, and doeth them, I will liken him unto a wise man building his house upon a rock" (he doth not yield to temptation). "The rain descended, the floods came, the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock. But he that heareth my words, and doeth them not" (now let each one of us fear and beware), "I will liken him to a foolish man, who built his house upon the sand: the rain descended, the floods came, the winds blew, and beat upon that house; and it fell: and great was the fall of it." What profit is it to enter the Church for him who builds upon the sand? For, by hearing and not doing, he builds indeed, but on the sand. For if he hears nothing, he builds nothing; but if he hears, he builds. But we ask, Where? For if he hears and does, he builds upon the rock; if he hears and does not, he builds upon the sand. There are two kinds of builders, those building upon the rock, and those building upon the sand. What, then, are those who do not hear? Are they safe? Does He say that they are safe because they do not build? They are naked beneath the rains, before the winds, before the floods; when these come, they carry away: those persons before they overthrow the houses. It is then the only security, both to build, and to build upon the rock. If thou wilt hear and do not, thou buildest; but thou buildest a ruin: and when temptation comes it overthrows the house, and carries away thee with the ruin. But if thou dost not hear, thou art naked; thou thyself art dragged away by those temptations. Hear, then, and do; it is the only remedy. How many, perchance, on this day, by hearing and not doing, are hurried away on the stream of this festival! For, through hearing and not doing, the flood cometh, this annual festival; the torrent is filled, it will pass away and become dry, but woe to him whom it shall carry away! Know this, then, beloved, that unless a man hears and does, he builds not upon the rock, and he does not belong to that great name which the Lord so commended. For He has called thy attention. For if Simon had been called Peter before, thou wouldest not have so clearly seen the mystery of the rock, and thou wouldest have thought that he was called so by chance, not by the providence of God; therefore God willed that he should be called first something else, that by the very change of name the reality of the sacrament might be commended to our notice.