One of my friends started a company in 1997, seven years before Facebook, called SocialNet. And they had all these ideas, and you could be, like, a cat, and I'd be a dog on the Internet, and we'd have this virtual reality, and we would just not be ourselves. That didn't work because reality always works better than any fake version of it.

I think competition can make people stronger at whatever it is they're competing on. If we're competing in some athletic event for competitive swimmers, really intensely competing, it's likely that both of us will become better, but it's also quite possible we'll lose sight of what's truly valuable.

The most successful businesses have an idea for the future that's very different from the present - and that's not fully valued.

Properly defined, a startup is the largest group of people you can convince of a plan to build a different future.

People are worried about privacy, and its one of the reasons people are using a service like SnapChat.