Galatians 6:15 - Matthew Poole's English Annotations on the Holy Bible

Under the gospel state as settled by Christ, with reference to salvation, it is of no moment whether a man be a Jew or a Gentile; but whether a man be regenerated or not, and be renewed by the Holy Ghost, so as old things with him be passed away, and all things be become new. He had said the same, Galatians 3:28, Galatians 5:6. See also 2 Corinthians 5:17. Under the law, indeed, there was something in circumcision, as it was God's covenant in the flesh to that people to whom he gave it, and the uncircumcised were strangers to the covenants of promise, and aliens to the church of God; but under the gospel, circumcision and uncircumcision are of no significancy; God neither regardeth any for the former, nor rejecteth any for the latter, he only looketh at the heart and inward man, whether that be renewed and sanctified, yea or no.