“For circumcision verily profiteth, if thou keep the law: but if thou be a breaker of the law, thy circumcision is made uncircumcision.”
King James Version (KJV)
2:25 Circumcision indeed profiteth - He does not say, justifies. How far it profited is shown in the third and fourth chapters. Thy circumcision is become uncircumcision - is so already in effect. Thou wilt have no more benefit by it than if thou hadst never received it. The very same observation holds with regard to baptism.
Ro 2:25 For circumcision verily profiteth. The Jew was wont to fall back on his circumcision, as some still do on some outward ordinance. His answer to Paul is, Are we not the circumcised? Are not the circumcised the people of the covenant? He replied, "I admit that circumcision availeth, if one keeps law. The outward observance profits if one be a law-doer; that is, complies with its moral commandments. But if he fails to do this, his circumcision is as worthless as though he was uncircumcised". The effect of habitual transgression is to annul the covenant.