‘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.’
Here is Paul magnificently explaining first, how not to gain the ear of God, and then how to do so – by understanding how He saves the soul and changes the life; also how to approach Him. This is the way to find and know Him.
Coming to God is not just a matter of having good opinions about Him. It involves the heart as well as the mind. Here are the differences between mental belief only, and believing in Christ with the entire person.