“Rabbi, we know that you are a teacher who has come from God."
“Very truly I tell you, no one can see the kingdom of God unless they are born again.”
“How can someone be born when they are old?”
“Very truly I tell you, no one can enter the kingdom of God unless they are born of water and the Spirit."
“How can this be?”
"I have spoken to you of earthly things and you do not believe; how then will you believe if I speak of heavenly things?"
Jesus and Nicodemus, a pharisees, met at midnight in secret. Nicodemus told Jesus that he knew Him because of the miracles He had performed, but Jesus affirmed that to see the Kingdom of God Nicodemus had to be born again.
"Just as Moses lifted up the snake in the wilderness, so the Son of Man must be lifted up, that everyone who believes may have eternal life in him.”
Nicodemus didn't understand what "to be born again" meant, but he surely knew that it didn't mean to get into your mother's womb again. Jesus clarified to Nicodemus that to be "born again" meant to be born in water and Spirit.
Nicodemus didn't understand what Jesus meant by being born again, yet he had been studying Jesus all his life.
Because Nicodemus couldn't understand, Jesus explained him a verse that said how great God was to give His one and only Son to the earth, and compared the lifting of the snake with His crucifixion.
The women at the well was at the lowest point on social hierarchy while Nicodemus was a well known pharisee.
Jesus met with the samaritan at day while he met with Nicodemus at midnight.