The idea that you try to time purchases based on what you think business is going to do in the next year or two, I think that's the greatest mistake that investors make because it's always uncertain. People say it's a time of uncertainty. It was uncertain on September 10th, 2001, people just didn't know it. It's uncertain every single day. So take uncertainty as part of being involved in investment at all. But uncertainty can be your friend. I mean, when people are scared, they pay less for things. We try to price. We don't try to time at all.

Risk comes from not knowing what you're doing.

In the world of business, the people who are most successful are those who are doing what they love.

Risk can be greatly reduced by concentrating on only a few holdings.

But 300 million Americans, their lending institutions, their government, their media, all believed that house prices were going to go up consistently. And that got billed into a $20 trillion residential home market. Lending was done based on it, and everybody did a lot of foolish things.

Our future rates of gain will fall far short of those achieved in the past. Berkshire's capital base is now simply too large to allow us to earn truly outsized returns. If you believe otherwise, you should consider a career in sales but avoid one in mathematics.

Investment ideas, like women are often more exciting than punctual.