Understanding how to be a good investor makes you a better business manager and vice versa.

You're looking for a mispriced gamble. That's what investing is. And you have to know enough to know whether the gamble is mispriced. That's value investing.

Rationality is not just something you do so that you can make more money, it is a binding principle. Rationality is a really good idea. You must avoid the nonsense that is conventional in one's own time. It requires developing systems of thought that improve your batting average over time.

The interesting thing about it to me is the mindset. With all these "helpers" running around, they talk about doing deals. We talk about welcoming partners. The guy doing deals, he wants to do a deal and then unwind it in the near future. It's totally opposite for us. We like to build lasting relationships. I think our system will work better in the long term than flipping deals. I think there are so many of them [helpers] that they'll get in ea h other's way. I don't think they'll make enough money to meet their expectations, by flipping, flipping, flipping.

I think the main figure that matters to all of us, including people in the media, is: How does GDP per capita grow? And those figures have been very good. There is a huge flux both up and down, so it isn't like we're all static in status. What's important is that pie grows.

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

We don't have an isolated group [of senior managers] surrounded by servants. Berkshire's headquarters is a tiny little suite. We just came back from Berkshire's board meeting; it had moved up to the board room of the Kiewit company and [it was so large and luxurious that] I felt uncomfortable.