I know it sounds corny, but I’d love to improve people’s lives, especially socially… Making the world more open is not an overnight thing. It’s a ten-to-fifteen-year thing.

The world is changing so quickly, with mobile stuff and different platforms emerging, that I think it's more likely that the biggest competitor for Facebook is someone that we haven't heard of. What that means for us is that we should just really stay focused on what we're doing.

In the olden times, privacy was good. Today people want to share, people are more open.

Facebook is inherently viral.

People influence people. Nothing influences people more than a recommendation from a trusted friend. A trusted referral influences people more than the best broadcast message. A trusted referral is the Holy Grail of advertising.

I don't have an alarm clock. If someone needs to wake me up, then I have my BlackBerry next to me.

Move fast and break things. Unless you are breaking stuff, you are not moving fast enough.