...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.

It would be nice if this [finding really cheap stocks] happened all the time. Unfortunately, it doesn't.

... some important factor doesn't lose its "share of force" just because some "expert" can better measure other types of force.

The safest way to get what you want is to deserve what you want.

Size will hurt returns. Look at Berkshire Hathaway - the last five things Warren has done have generated returns that are splendid by historical standards, but now give him $100 billion in assets and measure outcomes across all of it, it doesn't look so good. We can only buy big positions, and the only time we can get big positions is during a horrible period of decline or stasis. That really doesn't happen very often.

And your brain doesn't naturally know how to think the way Zeckhauser knows how to play bridge. "for example," people do not react symmetrically to loss and gain. Well maybe a great bridge player like Zeckhauser does, but that's a trained response. Ordinary people, subconsciously affected by their inborn tendencies.

It would be one of the most irritating experiences in the world to do a lot of work to uncover a fraud and then at have it go from X to 3X and at h the crooks happily partying with your money while you're meeting margin calls. Why would you want to go within hailing distance of that?