You have to know accounting. It's the language of practical business life. It was a very useful thing to deliver to civilization. I've heard it came to civilization through Venice which of course was once the great commercial power in the Mediterranean. However, double entry bookkeeping was a hell of an invention.

When we were young, there weren't very many smart people in the investment world. You should have seen the people in the bank trust departments. Now, there are armies of smart people at private investment funds, etc . If there were a crisis now, there would be a lot more people with a lot of money ready to take advantage.

To me, it's obvious that the winner has to bet very selectively. It's been obvious to me since very early in life. I don't know why it's not obvious to very many other people.

At Berkshire Hathaway we do not like to compete against Chinese manufacturers.

If you're going to buy something which compounds for 30 years at 15% per annum and you pay one 35% tax at the very end, the way that works out is that after taxes, you keep 13.3% per annum. In contrast, if you bought the same investment, but had to pay taxes every year of 35% out of the 15% that you earned, then your return would be 15% minus 35% of 15%-or only 9.75% per year compounded. So the difference there is over 3.5%. And what 3.5% does to the numbers over long holding periods like 30 years is truly eye-opening.

I don't want to understand Facebook.

Why should it be easy to do something that, if done well, two or three times, will make your family rich for life?