Acts XV. 1
“And certain men which came down from Judea taught the brethren, and said, Unless you are circumcised after the manner of Moses, you cannot be saved.”
Mark how at every step of the right progress in respect of the Gentiles, the beginning is brought in as matter of necessity. Before this (Peter) being found fault with, justified himself, and said all that he said in the tone of apology, which was what made his words acceptable: then, the Jews having turned away, upon this (Paul) came to the Gentiles. Here again, seeing another extravagance coming in, upon this (the apostle) enacts the law. For as it is likely that they, as being taught of God, discoursed to all indifferently, this moved to jealousy them of the Jews (who had believed). And they did not merely speak of circumcision, but they said, You cannot even be saved. Whereas the very opposite to this was the case, that receiving circumcision they could not be saved. Do you mark how closely the trials succeed each other, from within, from without? It is well ordered too, that this happens when Paul is present, that he may answer them. “When therefore Paul and Barnabas had no small dissension and disputation with them, they determined that Paul and Barnabas, and certain other of them, should go up to Jerusalem unto the apostles and elders about this question.” And Paul does not say, What? Have I not a right to be believed after so many signs? But he complied for their sakes. “And being brought on their way by the Church, they passed through Phenice and Samaria, declaring the conversion of the Gentiles: and they caused great joy unto all the brethren.” And observe, the consequence is that all the Samaritans also, learn what has come to the Gentiles: and they rejoiced. “And when they had come to Jerusalem, they were received of the Church, and of the apostles and elders, and they declared all things that God had done with them.” See what a providence is here! “But there rose up certain of the sect of the Pharisees which believed, saying, That it was needful to circumcise them, and to command them to keep the law of Moses. And the apostles and elders came together to consider of this matter. And when there had been much disputing, Peter rose up and said unto them, Men and brethren, you know how that of old days God made choice among us, that the Gentiles by my mouth should hear the word of the Gospel, and believe.” Observe Peter from the first standing aloof (κεχωρισμένον) from the affair, and even to this time judaizing. And yet (says he) “ye know.” Perhaps those were present who of old found fault with him in the matter of Cornelius, and went in with him (on that occasion): for this reason he brings them forward as witnesses. “From old days,” he says, “did choose among you.” What means, “Among you?” Either, in Palestine, or, you being present. “By my mouth.” Observe how he shows that it was God speaking by him, and no human utterance. “And God, that knows the hearts, gave testimony unto them:” he refers them to the spiritual testimony: “by giving them the Holy Ghost even as unto us.” Everywhere he puts the Gentiles upon a thorough equality. “And put no difference between us and them, having purified their hearts by faith.” From faith alone, he says, they obtained the same gifts. This is also meant as a lesson to those (objectors); this is able to teach even them that faith only is needed, not works nor circumcision. For indeed they do not say all this only by way of apology for the Gentiles, but to teach (the Jewish believers) also to abandon the Law. However, at present this is not said. “Now therefore why do you tempt God, to put a yoke upon the neck of the disciples?” What means, “Tempt ye God?” As if He had not power to save by faith. Consequently, it proceeds from a want of faith, this bringing in the Law. Then he shows that they themselves were nothing benefited by it, and he turns the whole (stress of his speech) against the Law, not against them, and (so) cuts short the accusation of them: “which neither our fathers nor we were able to bear. But we believe that through the grace of the Lord Jesus we shall be saved, even as they.” How full of power these words! The same that Paul says at large in the Epistle to the Romans, the same says Peter here. “For if Abraham,” says (Paul), “was justified by works, he has whereof to glory, but not before God.” Do you perceive that all this is more a lesson for them than apology for the Gentiles? However, if he had spoken this without a plea for speaking, he would have been suspected: an occasion having offered, he lays hold of it, and speaks out fearlessly. See on all occasions how the designs of their foes are made to work with them. If those had not stirred the question, these things would not have been spoken, nor what follows.
Source: Homilies on Acts (New Advent)