I'm with Hayward on this issue. I'm feeling overwhelmed. I think the key (probably already said) is in the nature of the thinking processes. The genius thinks at a much higher level than the average person, perceiving connections that the average person could never perceive. I hate to think of the human versus ant difference, but it can almost be that strong. (My son shared with me a book about geniuses.) When people think differently than most folks, then they start getting perceived as "insane."