10 But these things are small when compared with what follows. The sacred historian Luke further relates: “And when we had come to Jerusalem, the brethren received us gladly;” and the day following, James, and all the elders who were with him, having expressed their approbation of his gospel, said to Paul: “You see, brother, how many thousands of Jews there are which believe; and they are all zealous of the law: and they are informed of you, that you teach all the Jews which are among the Gentiles to forsake Moses, saying that they ought not to circumcise their children, neither to walk after the customs. What is it therefore? The multitude must needs come together: for they will hear that you have come. Do therefore this that we say to you: We have four men which have a vow on them; them take, and purify yourself with them, and be at charges with them, that they may shave their heads: and all may know that those things, whereof they were informed concerning you, are nothing; but that you yourself also walkest orderly, and keepest the law. Then Paul took the men, and the next day purifying himself with them, entered into the temple, to signify the accomplishment of the days of purification, until an offering should be offered for every one of them.” O Paul, here again let me question you: Why did you shave your head, why did you walk barefoot according to Jewish ceremonial law, why did you offer sacrifices, why were victims slain for you according to the law? You will answer, doubtless, “To avoid giving offense to those of the Jews who had believed.” To gain the Jews, you pretended to be a Jew; and James and all the other elders taught you this dissimulation. But you did not succeed in escaping, after all. For when you were on the point of being killed in a tumult which had arisen, you were rescued by the chief captain of the band, and was sent by him to Cæsarea, guarded by a careful escort of soldiers, lest the Jews should kill you as a dissembler, and a destroyer of the law; and from Cæsarea coming to Rome, you did, in your own hired house, preach Christ to both Jews and Gentiles, and your testimony was sealed under Nero's sword.
11. We have learned, therefore, that through fear of the Jews both Peter and Paul alike pretended that they observed the precepts of the law. How could Paul have the assurance and effrontery to reprove in another what he had done himself? I at least, or, I should rather say, others before me, have given such explanation of the matter as they deemed best, not defending the use of falsehood in the interest of religion, as you charge them with doing, but teaching the honourable exercise of a wise discretion; seeking both to show the wisdom of the apostles, and to restrain the shameless blasphemies of Porphyry, who says that Peter and Paul quarrelled with each other in childish rivalry, and affirms that Paul had been inflamed with envy on account of the excellences of Peter, and had written boastfully of things which he either had not done, or, if he did them, had done with inexcusable presumption, reproving in another that which he himself had done. They, in answering him, gave the best interpretation of the passage which they could find; what interpretation have you to propound? Surely you must intend to say something better than they have said, since you have rejected the opinion of the ancient commentators.
Source: Letters (New Advent)