Audio commentary on this verse

Note 1 at Ro 10:2: This scripture goes contrary to many religious teachings. Many people believe that it's not necessary to believe the right thing--just as long as people believe something, they'll be all right. However, Paul disproved this kind of thinking by saying in this passage that their zeal was without knowledge and therefore they were not saved.

The Jews were very zealous about their religion, but that wasn't enough. It's not enough just to believe; people have to believe the truth. Even those who are sincere can be sincerely wrong. Jesus said, "And ye shall know the truth, and the truth shall make you free" (Joh 8:32).