John 3:4-9

Nicodemus said to Him, “How can a man be born when he is old? He cannot enter his mother’s womb a second time and be born, can he?” Jesus answered, “I assure you and most solemnly say to you, unless one is born of water and the Spirit he cannot [ever] enter the kingdom of God. [Ezek 36:25-27] That which is born of the flesh is flesh [the physical is merely physical], and that which is born of the Spirit is spirit. Do not be surprised that I have told you, ‘You must be born again [reborn from above—spiritually transformed, renewed, sanctified].’ The wind blows where it wishes and you hear its sound, but you do not know where it is coming from and where it is going; so it is with everyone who is born of the Spirit.” Nicodemus said to Him, “How can these things be possible?”