If the bible can't convince you what will, If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?
Truly, truly, I tell you, no one can enter the kingdom of God unless he is born of water and the Spirit. Flesh is born of flesh, but spirit is born of the Spirit. Do not be amazed that I said, ‘You must be born again.’ The wind blows where it wishes. You hear its sound, but you do not know where it comes from or where it is going. So it is with everyone born of the Spirit.