Phenomenal read..... "In other words, what will differentiate people is not how smart they are but their relationship to mental effort. Right now, some people have what psychologists call a high need for cognition. They enjoy thinking hard. These are the people who enjoy playing difficult games and reading dense books. On the other end of the spectrum, there are the cognitive misers, the people who find it unpleasant to think hard and take any opportunity not to do it. In the middle are the people who have a medium need for cognition. They will put in the effort when they really care about something, but they don't intrinsically enjoy it. Need for cognition correlates with intelligence but is not the same thing. We all know a lot of really smart people who don't like to work hard."