You all enter into a large room that is very windy. In the middle of the room is...

...a girl whose dress and hair are blowing in the wind. She turn to you smiling and singing out , "'The wind bloweth where it willeth, and thou hearest the sound of it, but canst not tell from where it cometh, and where it goeth; so is every one that is born of the Spirit.' - tell me which of the four gospels does this come from and you will know which door to go through!"