We are in charge of our bodies, we run the show, we decide which ideas to believe in and which to reject. But do we really? If you begin to think about selfish memes it becomes clear that our ideas are in our heads because they are successful memes. American philosopher Dan Dennett (1995) concludes that a "person" is a particular sort of animal infested with memes. In other words you and I and all our friends are the products of two blind replicators, the genes and the memes.
This simple logic explains why it is so hard for us to sit down and "not think"; why the battle to subdue "our" thoughts is doomed. In a very real sense they are not "our" thoughts at all. They are simply the memes that happen to be successfully exploiting our brain-ware at the moment.