Once you start doing something bad, then it's easy to take the next step - and in the end, you're a moral sewer.

I try to get rid of people who always confidently answer questions about which they don't have any real knowledge.

Invert, always invert.

When you borrow a man's car, always return it with a tank of gas.

A lot of share-buying, not bargain-seeking, is designed to prop stock prices up. Thirty to 40 years ago, it was very profitable to look at companies that were aggressively buying their own shares. They were motivated simply to buy below what it was worth.

The idea of caring is that someone is making money faster [than you are] is one of the deadly sins. Envy is a really stupid sin because it’s the only one you could never possibly have any fun at. There’s a lot of pain and no fun. Why would you want to get on that trolley?

I did not succeed in life by intelligence. I succeeded because I have a long attention span.