 Judging by this passage, there are evidently two expressions of the moral law according to Paul: The Mosaic Law, explicitly handed down to the Jews, and another law that is “written on [men’s] hearts”. This latter was later glossed as a reference to the natural law, which is accessible to all people, non-Jews included, and is consistent with the Mosaic Law. Notice that, according to the foregoing passage, conscience (syneidesis) is not the ultimate source of right and wrong. Rather, the foundation of right and wrong is the objective moral law, which is both “written on [men’s] hearts” and borne witness to by conscience.