Thematic Bible: Whose circumcision is made uncircumcision

Circumcision is certainly of use, provided you keep the Law; but if you are a breaker of the Law, then your circumcision is turned into uncircumcision. (If then the uncircumcised observe the requirements of the Law, shall not their uncircumcision be reckoned equivalent to circumcision? And shall not those who are physically uncircumcised and who fulfil the Law, judge you who are a breaker of the Law for all your written code and circumcision?)