Morning Scepticism: Genius

I really wonder about people who think they are a genius. While no doubt geniuses exist and there are remarkable people who will go unacknowledged, it takes quite a lot to think that you are one of them. Perhaps how good the illusion of consistency is in the brain, that you "get it" when everyone else doesn't. It makes sense to you, you see its internal consistency, and no-one else is buying it because they fail to live up to your genius. And what's really more likely, that you have some revolutionary idea that will overthrow the direction of humanity or your just some hack who's convinced otherwise?