st augustine on circumcision

St. Augustine on circumcision

But in the case of those [i.e. Gentiles] who had no such training, but were brought to Christ, the corner-stone, from the opposite wall of circumcision, there was no obligation to adopt Jewish customs. If, indeed, like Timothy, they chose to accommodate themselves to the views of those of the circumcision who were still wedded to their old sacraments, they were free to do so. But if they supposed that their hope and salvation depended on these works of the law, they were warned against them as a fatal danger. So the apostle says: “Behold, I Paul say unto you, that if you be circumcised, Christ shall profit you nothing;” (Galatians 5:2) that is, if they were circumcised, as they were intending to be, in compliance with some corrupt teachers, who told them that without these works of the law they could not be saved. For when, chiefly through the preaching of the Apostle Paul, the Gentiles were coming to the faith of Christ, as it was proper that they should come, without being burdened with Jewish observances — for those who were grown up were deterred from the faith by fear of ceremonies to which they were not accustomed, especially of circumcision; and if they who had not been trained from their birth to such observances had been made proselytes in the usual way, it would have implied that the coming of Christ still required to be predicted as a future event — when, then, the Gentiles were admitted without these ceremonies, those of the circumcision who believed, not understanding why the Gentiles were not required to adopt their customs, nor why they themselves were still allowed to retain them, began to disturb the Church with carnal contentions, because the Gentiles were admitted into the people of God without being made proselytes in the usual way by circumcision and the other legal observances. Some also of the converted Gentiles were bent on these ceremonies, from fear of the Jews among whom they lived. Against these Gentiles the Apostle Paul often wrote, and when Peter was carried away by their hypocrisy, he corrected him with a brotherly rebuke. (Galatians 2:14) Afterwards, when the apostles met in council, decreed that these works of the law were not obligatory in the case of the Gentiles, (Acts 15:6-11) some Christians of the circumcision were displeased, because they failed to understand that these observances were permissible only in those who had been trained in them before the revelation of faith, to bring to a close the prophetic life in those who were engaged in it before the prophecy was fulfilled, lest by a compulsory abandonment it should seem to be condemned rather than closed; while to lay these things on the Gentiles would imply either that they were not instituted to prefigure Christ, or that Christ was still to be prefigured. The ancient people of God, before Christ came to fulfill the law and the prophets, were required to observe all these things by which Christ was prefigured. It was freedom to those who understood the meaning of the observance, but it was bondage to those who did not. But the people in those latter times who come to believe in Christ as having already come, and suffered, and risen, in the case of those whom this faith found trained to those sacraments, are neither required to observe them, nor prohibited from doing so; while there is a prohibition in the case of those who were not bound by the ties of custom, or by any necessity, to accommodate themselves to the practice of others, so that it might become manifest that these things were instituted to prefigure Christ, and that after His coming they were to cease, because the promises had been fulfilled. Some believers of the circumcision who did not understand this were displeased with this tolerant arrangement which the Holy Spirit effected through the apostles, and stubbornly insisted on the Gentiles becoming Jews. These are the people of whom Faustus speaks under the name of Symmachians or Nazareans. Their number is now very small, but the sect still continues. (Contra Faustum, Bk 19, para. 17)

found in comment 33 here 

http://www.calledtocommunion.com/2010/06/reformed-imputation-and-the-lords-prayer/