We've got great flexibility and a certain discipline in terms of not doing some foolish thing just to be active - discipline in avoiding just doing any damn thing just because you can't stand inactivity.

Part of that, I think, is being able to tune out folly, as distinguished from recognizing wisdom. You've got whole categories of things you just bat away so your brain isn't cluttered with them. That way, you're better able to pick up a few sensible things to do.

We don't claim to have perfect morals, but at least we have a huge area of things that, while legal, are beneath us. We won't do them. Currently, there's a culture in Americathat says that anything that won't send you to prison is OK.

...in terms of business mistakes that I've seen over a long lifetime, I would say that trying to minimize taxes too much is one of the great standard causes of really dumb mistakes. I see terrible mistakes from people being overly motivated by tax considerations. Warren and I personally don't drill oil wells. We pay our taxes. And we've done pretty well, so far. Anytime somebody offers you a tax shelter from here on in life, my advice would be don't buy it.

I think we have lost our way when people like the [board of] governors and the CEO of the NYSE fail to realize they have a duty to the rest of us to act as exemplars... You do not want your first-grade school teacher to be fornicating on the floor or drinking booze in the classroom; similarly you do not want your stock exchange to be setting the wrong moral example.

Avoid evil, particularly if they're attractive members of the opposite sex.

Economists get very uncomfortable when you talk about virtue and vice. It doesn't lend itself to a lot of columns with numbers. But I would argue that there are big virtue effects in economics. I would say that the spreading of double-entry bookkeeping by the Monk, Fra Luce de Pacioli, was a big virtue effect in economics. It made business more controllable, and it made it more honest.