Adam Clarke

Wherefore remember - That ye may ever see and feel your obligations to live a pure and holy life, and be unfeignedly thankful to God for your salvation, remember that ye were once heathens in the flesh - without the pure doctrine, and under the influence of your corrupt nature; such as by the Jew's (who gloried, in consequence of their circumcision, to be in covenant with God) were called uncircumcision; i.e. persons out of the Divine covenant, and having no right or title to any blessing of God.