The one who is physically uncircumcised and yet fulfills the law will judge you, who have the letter and the circumcision and still break the law.
In context
25Circumcision has value if you keep the law; but if you break the law, your circumcision has turned into uncircumcision. 26So if an uncircumcised man keeps the just requirements of the law, will his uncircumcision not be counted as circumcision? 27The one who is physically uncircumcised and yet fulfills the law will judge you, who have the letter and the circumcision and still break the law. 28For no one is a Jew who is one on the surface, and circumcision is not what is done on the surface, in the flesh. 29The Jew is the one who is a Jew inwardly, and circumcision is of the heart—by the Spirit, not by the letter. Such a person’s praise comes not from people but from God.