Without numerical fluency, in the part of life most of us inhibit, you are like a one-legged man in an ass-kicking contest.

A business model that relies on trickery is doomed to fail.

When you locate a bargain, you must ask, 'Why me, God? Why am I the only one who could find this bargain?'

It's in the nature of stock markets to go way down from time to time. There's no system to avoid bad markets. You can't do it unless you try to time the market, which is a seriously dumb thing to do. Conservative investing with steady savings without expecting miracles is the way to go.

We're guessing at our future opportunity cost. Warrenis guessing that he'll have the opportunity to put capital out at high rates of return, so he's not willing to put it out at less than 10% now. But if we knew interest rates would stay at 1%, we'd change. Our hurdles reflect our estimate of future opportunity costs.

Over the long term, it's hard for a stock to earn a much better return that the business which underlies it earns. If the business earns six percent on capital over forty years and you hold it for that forty years, you're not going to make much different than a six percent return - even if you originally buy it at a huge discount. Conversely, if a business earns eighteen percent on capital over twenty or thirty years, even if you pay an expensive looking price, you'll end up with one hell of a result.

I bet Richard Fuld doesn't have an ounce of contrition. It's just megalomania. When it's like that, you need rules to prevent catastrophe. When banks are borrowing the government's credit rating, you need rules to prevent stupid things.