I liked the Alien Space Bat description of a control system. The idea that our psychology is a collection of control systems, originated by a control engineer sounds like the cliche "if you're holding a hammer, everything look like a nail" and I don't know how the belief itself controls anticipation (http://www.overcomingbias.com/2007/07/making-beliefs-.html). So as of now, I still don't know why I need to know about control theory.