Rationality is not just something you do so that you can make more money, it is a binding principle. Rationality is a really good idea. You must avoid the nonsense that is conventional in one's own time. It requires developing systems of thought that improve your batting average over time.
Charlie MungerYou don't have to be brilliant, only a little bit wiser than the other guys, on average, for a long, long, time.
Charlie MungerWell, the questioner came from Singapore, which has perhaps the best economic record in the history of developing an economy. And therefore he referred to 15 percent per annum as modest. It's not modest, it's arrogant.
Charlie Munger