Go to bed smarter than when you woke up.

...being an effective teacher is a high calling.

I think there's something to be said for developing the disposition to own stocks without fretting.

A rough rule in life is that an organization foolish in one way in dealing with a complex system is all too likely to be foolish in another.

Black-Scholes works for short-term options, but if it's a long-term option and you think you know something [about the underlying asset], it's insane to use Black-Scholes.

Even bright people are going to have limited, really valuable insights in a very competitive world when they're fighting against other very bright, hardworking people. And it makes sense to load up on the very few good insights you have instead of pretending to know everything about everything at all times.

I feel that by getting rich in the way I did, I think my own example has hurt my own country.