 Nicodemus didn't understand it in John chapter 3. Jesus has said to him, unless a man is born again, he cannot see the kingdom of God. Unless a man is born again, he cannot enter the kingdom of God. And Nicodemus surprisingly starts this big question, this kind of obstetrician dialogue, and Jesus says, no, you missed the point entirely. And he says, there is a mystery in this. The wind blows. You don't know where it comes from or where it's going.