"I used to think my brain was the most interesting part of my body"

"... but then I realized, hey, look what's telling me that." --Emo Phillips

Brought to mind by passage in, of all things, Cracked Magazine Onine's article "6 Brainwashing Techniques They're Using On You Right Now" by David Wong:

Studies show the brain is wired to get a quick high from reading things that agree with our point of view. The same studies proved that, strangely, we also get a rush from intentionally dismissing information that disagrees, no matter how well supported it is. Yes, our brain rewards us for being closed-minded dicks.