Is Paul is talking about a person being a Jew vs. Gentile, or the physical act of circumcision, or maybe both? I find this passage unclear because Paul implies that someone can change their status - but this is only possible in one of two directions. Namely, as far as I know, a Jew cannot become a Gentile, nor can one who is circumcised become uncircumcised. Why does Paul say "Let him not become uncircumcised" if in any case, such was impossible?. 18 Was anyone called while circumcised? Let him not become uncircumcised. Was anyone called while uncircumcised? Let him not be circumcised. 19 Circumcision is nothing and uncircumcision is nothing, but keeping the commandments of God is what matters.
Thanks
Peter