John 3:3-6

3Jesus replied, “Very truly I tell you, no one can see the kingdom of God unless they are born again.” 4“How can someone be born when they are old?” Nicodemus asked. “Surely they cannot enter a second time into their mother’s womb to be born!” 5Jesus answered, “Very truly I tell you, no one can enter the kingdom of God unless they are born of water and the Spirit. 6Flesh gives birth to flesh, but the Spirit gives birth to spirit.