Romans 10:9-10

“ Seeing that if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised Him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. ”

The two terms: confessing with the mouth and believing with the heart, reproduce the ideas in thy mouth and in thy heart, of Romans 10:8. These are the two conditions of salvation; for while faith suffices to take hold of the finished expiation, when this faith is living, it inevitably produces profession, and from this follows incorporation into the flock already formed, by means of invocation and baptism. Profession is put first here, in keeping with the words of Moses (Romans 10:8: in thy mouth); the order is that which from the external ascends to the internal; it reminds us that profession would be nothing without faith.

The object of the profession is the title Lord given to Christ, as is done in the invocation by which we publicly declare ourselves subjects; comp. 1 Corinthians 12:3 (according to the true reading). Here again we find the idea of Romans 10:6, that of the glorified Christ. The same relation between the sovereignty of Christ and the Christian profession appears in Philippians 2:9-11: “Wherefore God hath supremely exalted Him...that every tongue should confess that He is Lord.” This allusion to Romans 10:6 proves clearly that the reference there was not to the incarnation; for Jesus is called by the title of Lord, as the glorified, and not as the pre-existent Christ.

On the other hand, the special object of faith is Christ risen. The reason is clear: it is in the external fact of the resurrection that faith apprehends its essential object, the moral fact of justification; comp. Romans 4:25.

Paul concludes this long sentence with a brief summary word: σωθήσῃ, thou shalt be saved, as if he would say: After that all is done. Romans 10:10 demonstrates in fact that these conditions once complied with, salvation was sure.