Not sure how I found this and I'm not really a reader of psychology blogs, but I found this to be very interesting.  I'm not sending to you because I'm thinking of you as being in urgent need of it (although a key point is that it applies to all of us in many areas). I first thought of lifelong politicians, but many religious leaders and "thinkers" would fit the bill as well.
Well worth the 5 minutes it will take to read. Also not a bad study to be able to refer to when dealing with know-it-alls!
- Recommended by Steven Jacoby, Malpaisillo, Nicaragua