Breakthrough ideas look crazy, nuts. It’s hard to think this way — I see it in other people’s body language, and I can feel it in my own, where I sometimes feel like I don’t even care if it’s going to work, I can’t take more change. O.K., Google, O.K., Twitter—but Airbnb? People staying in each other’s houses without there being a lot of axe murders?

Nokia and Research in Motion needed a modern operating system. They could have bought Palm or Android before Google did, but they didn't. Today, it's probably too late, and at the time they would have been criticized for overpaying, but as they say - shift happens.

Google is working on self-driving cars, and they seem to work. People are so bad at driving cars that computers don't have to be that good to be much better.

Great CEOs are not just born with shiny hair and a tie.

At a certain point in your career - I mean, part of the answer is a personal answer, which is that at a certain point in your career, it becomes more satisfying to help entrepreneurs than to be one.

Practically everyone is going to have a general purpose computer in their pocket, it's so easy to underestimate that, that has got to be the really, really big one.

The most important thing is to get on the right horse.