I don't spend much time regretting the past, once I've taken my lesson from it. I don't dwell on it.

Go to bed smarter than when you woke up.

Wesco had a market capitalization of $40 million when we bought it [in the early 1970s]. It's $2 billion now. It's been a long slog to a perfectly respectable outcome - not as good as Berkshire Hathaway or Microsoft, but there's always someone in life who's done better.

Proper accounting is like engineering. You need a margin of safety. Thank God we don't design bridges and airplanes the way we do accounting.

The best thing a human being can do is to help another human being know more.

Darwin paid particular attention to disconfirming evidence. Objectivity maintenance routines are totally required in life if you're going to be a great thinker.

How should the best parts of psychology and economics interrelate in an enlightened economist's mind?... I think that these behavioral economics...or economists are probably the ones that are bending them in the correct direction. I don't think it's going to be that hard to bend economics a little to accommodate what's right in psychology.