I knew Mac pretty well. I'd used them when I was younger.

I don't think of Twitter as a social network. I think of it as a messaging system that has a lot of social components to it.

Even though running is physically straining, it's mentally refreshing. Especially when you feel like you've accomplished something.

If people are passionate about your product, whether it's because they're hating or loving it, those are both good scenarios.

I started out as an artist, and I continue to think of myself as an artist first, and a technologist and entrepreneur after that.

When you hand good people possibility, they do great things.

Creativity comes from constraint.