You know the feeling: you want to get up in the morning to exercise, but you also want to stay in bed. You want to save for retirement, but you hate the idea of investing in Wall Street.
These contradictions in our heads are fairly common — it's as though we have two brains.
On Voices in the Family, Dan Gottlieb considers the modular mind — how our brains are built for hypocrisy with psychologist Rob Kurzban, author of "Why Everybody Else is a Hypocrite," now out in paperback.
Kurzban is an Associate Professor in the Department of Psychology at the University of Pennsylvania. He blogs at the International Cognition and Culture Institute.
Photo by Flickr user Son of Groucho