between Jew and Greek; for the same Lord over all - that is, not God (as Calvin, Grotius, Olshausen, Hodge), but Christ, as will be seen, we think, by comparing Rom 10:9, Rom 10:12, Rom 10:13 and observing the apostle’s usual style on such subjects. (So Chrysostom, Melville, Bengel, Meyer, De Wette, Fritzsche, Tholuck, Stuart, Alford, Philippi).
is rich - a favorite Pauline term to express the exuberance of that saving grace which is in Christ Jesus.
unto all that call upon him - This confirms the application of the preceding words to Christ; since to call upon the name of the Lord Jesus is a customary expression. (See Act 7:59, Act 7:60; Act 9:14, Act 9:21; Act 22:16; 1Co 1:2; 2Ti 2:22).