This is Scary
One more idea from The Upside of Irrationality (sorry) that I can't stop thinking about-- this is an explanation of emotions and their influence on decision making, and Ariely explains it like this, we all know that our emotions can have an influence on our short-term decision making, you get stuck in traffic and it makes you irate, so you end up yelling at your kids about making noise in the car . . . but Ariely explains how this can lead to long-term influence . . . because though you usually don't remember your emotions from last week (how did you feel last Wednesday at noon?) you do remember your previous decisions and actions, and you generally think that your own behavior was rational and so you often repeat behaviors that happened in the past (this can be good, as well: you have a good day at work and get flowers for your wife in your ebullient mood, and then the week after, you just get her flowers because you are now the kind of guy who randomly gets his wife flowers-- you don't remember the good emotion that caused the initial decision, you just remember the decision) and so suddenly, because of some ephemeral emotions that you thought were short lived and only put you in a good or bad mood for a few minutes, the way you live your life is altered for good.