You grow more when you get more people's perspective.

Helping a billion people connect is amazing, humbling and by far the thing I am most proud of in my life.

On engagement, we're already seeing that mobile users are more likely to be daily active users than desktop users. They're more likely to use Facebook six or seven days of the week.

Building a mission and building a business go hand in hand.

We have a pretty ambitious goal for the world. What we think will make the Web better. What we think will make all these businesses that integrate with us run more effectively. I think if we stay focused on doing that, that's really the main thing that we need to do.

There are a few other things that I built when I was at Harvard that were kind of smaller versions of Facebook.

If you don't risk anything you risk everything