The great lesson in microeconomics is to discriminate between when technology is going to help you and when it's going to kill you. And most people do not get this straight in their heads. But a fellow like Buffett does. For example, when we were in the textile business, which is a terrible commodity business, we were making low-end textiles-which are a real commodity product. And one day, the people came to Warren and said, "They've invented a new loom that we think will do twice as much work as our old ones."

Trying to prioritize among things we're unlikely to do is pretty fruitless.

Everyone caved, adopted loose [accounting] standards, and created exotic derivatives linked to theoretical models. As a result, all kinds of earnings, blessed by accountants, are not really being earned. When you reach for the money, it melts away. It was never there. It [accounting for derivatives] is just disgusting. It is a sewer, and if I'm right, there will be hell to pay in due course. All of you will have to prepare to deal with a blow-up of derivative books.

I don't have the slightest interest in gold. I like understanding what works and what doesn't in human systems. To me that's not optional; that's a moral obligation. If you're capable of understanding the world, you have a moral obligation to become rational. And I don't see how you become rational hoarding gold. Even if it works, you're a jerk.

How you behave in one place, will help in surprising ways later.

It took us months of buying all the Coke stock we could to accumulate $1 billion worth - equal to 7% of the company. It's very hard to accumulate major positions.

Wells Fargo behaves better than the average big bank. But nobody's perfect.