John 3:10

The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit.

Nicodemus answered and said unto him, How can these things be?

Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.

If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?