At its core, I don't view Facebook as a social network. I think it could become the driver's license of the Internet. And beyond that, it can become the pipes and the plumbing upon what most of the Internet is built. I think it's very well positioned.

Lacking an external focus, the mind turns inward on itself and creates problems to solve, even if the problems are undefined or unimportant. If you find a focus, an ambitious goal that seems impossible and forces you to grow, these doubts disappear.

The best entrepreneurs I've ever met are all good communicators. It's perhaps one of the very few unifying factors.

I encourage active skepticism - when people are being skeptical because they're trying to identify the best course of action. They're trying to identify the next step for themselves or other people.

Most people can do absolutely awe-inspiring things. Sometimes they just need a little nudge.

If you see distraction externally, you end up creating an internally distracted state.

The downstream effects are unknown. Do your best and hope for the best. If you're improving the world-however you define that-consider your job well done.