Jews, Gentiles, and Works of the Law Continued, 3:9-31

Marcus and Ken continue their discussion of Romans 3:9-31, taking a question regarding Circumcision and Baptism.EMAIL: Last week, in your interpretation of Romans 2:29, you replaced Christian for Jew as an application. Instead of what Paul wrote—“For he is a Jew who is one inwardly, and real circumcision is a matter of the heart; spiritual and not literal”—you read: “For he is a Christian who is one inwardly, and real baptism is a matter of the heart; spiritual and not literal.”  If this is an accurate application—replacing circumcision with baptism—than doesn’t this imply that the sacrament of baptism, like circumcision, is merely a matter of the heart and faith, with no kind of literal sacramental effect? That it is merely symbolic? Thanks, Gene