If (investing) weren't a little difficult, everybody would be rich.

You have to have a temperament to grab ideas and do sensible things. Most people don’t grab the right ideas or don’t know what to do with them.

there are all kinds of wonderful new inventions that give you nothing as owners except the opportunity to spend a lot more money in a business that's still going to be lousy. The money still won't come to you. All of the advantages from great improvements are going to flow through to the customers.

Any year that you don't destroy one of your best-loved ideas is probably a wasted year

The game is to keep learning, and I don't think people are going to keep learning who don't like the learning process.

Just as a man working with his tools should know its limitations, a man working with his cognitive apparatus must know its limitations.

Intelligent people make decisions based on opportunity costs.