For with the heart — Not the understanding only. Man believeth to righteousness — So as to obtain justification. And with the mouth confession is made — So as to obtain final salvation. Confession here implies the whole of outward, as believing does the root of all inward, religion.
Related Commentaries of Romans 10:10
Romans 10:10
10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.