1 Jn 5:1, Jn 20:31
1 Jn 5:1 Whosoever believeth that Jesus is the Christ is born of God: and every one that loveth him that begat loveth him also that is begotten of him.
Jn 1:12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
The purpose of the writing of the Bible is to believe in Jesus as the Christ and to be saved. (Jn 20:31)
Jn 20:31 But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.