St John 3:3-5

Jesus answered, and said to him: Amen, amen I say to thee, unless a man be born again, he cannot see the kingdom of God. Nicodemus saith to him: How can a man be born when he is old? can he enter a second time into his mother's womb, and be born again? Jesus answered: Amen, amen I say to thee, unless a man be born again of water and the Holy Ghost, he cannot enter into the kingdom of God.