He who has the bride is the bridegroom; but the friend of the bridegroom, who stands and hears him, rejoices greatly because of the bridegroom's voice. This, my joy, therefore is made full.

 So then belief in Jesus has these three elements--belief that God is our loving Father, belief that Jesus is the son of God and therefore tells us the truth about God and life, and unswerving and unquestioning obedience to Jesus. 