The wind{The same Greek word (pneuma) means wind, breath, and spirit.} blows where it wants to, and you hear its sound, but don't know where it comes from and where it is going. So is everyone who is born of the Spirit."
He said, Are you a teacher of Israel, and don't you know these things? Verily, verily, I say unto you, I am speaking of those things that I know, and I am testifying of those things that I have seen; and you do not receive my witness. If I have talked to you about earthly things, and you did not believe, how will you believe, if I tell you of heavenly things? ( John 3:10-12 )