Jesus answered him, "Are you the teacher of Israel, and don't understand these things?

 3:1-6 There was a man who was one of the Pharisees who was called Nicodemus, a ruler of the Jews. He came to Jesus by night and said to him: "Rabbi, we know that you are a teacher who has come from God, for no one can do the signs which you do unless God is with him." Jesus answered him: "This is the truth I tell you--unless a man is reborn from above, he cannot see the kingdom of God." Nicodemus said to him: "How can a man be born when he is old? Surely he cannot enter into his mother's womb a second time and be born?" Jesus answered: "This is the truth I tell you--unless a man is born of water and the Spirit, he cannot enter into the kingdom of God. That which is born from the flesh is flesh, and that which is born of the Spirit is spirit." 