My grandmother used to say, "Sometimes the loudest person in the room doesn't know what they're talking about. " Or isn't secure enough in his or her own views to be able to listen to others.
The Stones suggested that if you dabble in decadence, you could turn into a devil-worshipping junkie. Paul McCartney suggested that if you mess around with girl worship, you could turn into a husband. So Paul was a lot scarier.