If you're unhappy, you should change what you're doing.

I've been an entrepreneur three times. I started three companies.

I think that every technology company that's more than 20 years old will break up

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?

Innovation accelerates and compounds. Each point in front of you is bigger than anything that ever happened.

If I want to get work done, that's usually about 3 in the morning.

At Microsoft, they all rock back and forth like Gates, they wear the same glasses, they have the same hair style. Maybe they grow them in tanks.