The word faith and believe are two different things and are not the same words. While faith is the convinction a person has in his God, believe is the trust you have in what God says concerning you. However, faith and believe seem to be synonymous with each other but are not the in meaning.
Faith is a deeper dimention of believe while believe is the trust you have in the knowledge of what you profess as a person. In other words, the faith you have as a person makes you a follower of the religion and faith that you confess, while your believe makes you trust and hope in the awareness and knowledge of such religion.