Damn that's interesting...

The Total Perspective Vortex

"Most people think of the "mentally disordered" as a delusional lot, holding bizarre and irrational ideas about themselves and the world around them. Isn’t a mental disorder, after all, an impairment or a distortion in thought or perception? This is what we tend to think, and for most of modern psychology's history, the experts have agreed; realistic perceptions have been considered essential to good mental health. More recently, however, research has arisen that challenges this common-sense notion."

Interesting reading over at Damn Interesting.