“You've got to have models in your head, and you've got to array your experience — both vicarious and direct — on this latticework of models.”

“I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up, and boy, does that help, particularly when you have a long run ahead of you.”

“Spend each day trying to be a little wiser than you were when you woke up.”

“You may say, 'My God, this is already getting way too tough.' But, fortunately, it isn't that tough — because 80 or 90 important models will carry about 90% of the freight in making you a worldly-wise person.”

“I have a name for people who went to the extreme efficient market theory — which is 'bonkers.' It was an intellectually consistent theory that enabled them to do pretty mathematics. So I understand its seductiveness to people with large mathematical gifts. It just had a difficulty in that the fundamental assumption did not tie properly to reality.”