When I went to school, it was right after the '60s and before this general wave of practical purposefulness had set in.... The idealistic wind of the '60s was still at our backs, though, and most of the people I know who are my age have that engrained in them forever.

One: demonstrations always crash. And two: the probability of them crashing goes up exponentially with the number of people watching.

When you grow up, you tend to get told that the world is the way it is, and your life is just to live your life inside the world. Try not to bash into the walls too much. Try to have a nice family life. Have fun, save a little money. That's a very limited life. Life can be much broader, once you discover one simple fact, and that is everything around that you call life was made up by people who were no smarter than you. And you can change it. You can influence it. You can build your own things that other people can use. Once you learn that, you'll never be the same again.

You know, my main reaction to this money thing is that it's humorous, all the attention to it, because it's hardly the most insightful or valuable thing that's happened to me.

Focus does not mean saying yes, it means saying no.

People think focus means saying yes to the thing you've got to focus on. But that's not what it means at all. It means saying no to the hundred other good ideas that there are. You have to pick carefully. I'm actually as proud of the things we haven't done as the things I have done. Innovation is saying no to 1,000 things.

If you don't cannibalize yourself, someone else will.