Belief is not just agreement with Christ, but also doing what He says. If a person truly believes Christ, he will live like Him.
There are many 'gospels' in the world but only one true gospel—the message that Christ brought about the good news of His coming Kingdom!
Instead of some grandiose title, God asks us to call Him simply "Father." We have human fathers, church fathers and since our calling, a spiritual Father. The role of father is very important!