John 3:2-4

One night he discreetly came to Jesus and said, “Rabbi, we know that you are a teacher come from God, for no one performs the miracle signs that you do, unless God’s power is with him.” Jesus answered, “Nicodemus, listen to this eternal truth: Before a person can even perceive God’s kingdom, they must first experience a rebirth.” Nicodemus said, “Rebirth? How can a gray-headed man be reborn? It’s impossible for anyone to go back into the womb a second time and be reborn!”