John 3:3-7 NIV

[3] Jesus 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!” [5] Jesus answered, “Very truly I tell you, no one can enter the kingdom of God unless they are born of water and the Spirit. [6] Flesh gives birth to flesh, but the Spirit gives birth to spirit. [7] You should not be surprised at my saying, ‘You must be born again.’