What do you see as the context for this passage?
John 3:1 Now there was a man of the Pharisees named Nicodemus, a ruler of the Jews. 2 This man came to Jesusby night and said to him, Rabbi, we know that you are a teacher come from God, for no one can do these signs that you do unless God is with him. 3 Jesus answered him, Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God. 4 Nicodemus said 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? 5 Jesus answered, Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God. 6 That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.
John 3:1 Now there was a man of the Pharisees named Nicodemus, a ruler of the Jews. 2 This man came to Jesusby night and said to him, Rabbi, we know that you are a teacher come from God, for no one can do these signs that you do unless God is with him. 3 Jesus answered him, Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God. 4 Nicodemus said 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? 5 Jesus answered, Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God. 6 That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.