People don't care about what someone says about you in a movie--or even what you say, right? They care about what you build.

If Facebook were a country, it would be the 8th most populated in the world, just ahead of Japan.

Young people are just smarter.

If I were starting now I would do things very differently. I didn't know anything. In Silicon Valley, you get this feeling that you have to be out here. But it's not the only place to be. If I were starting now, I would have stayed in Boston. [Silicon Valley] is a little short-term focused and that bothers me.

We want Facebook to be one of the best places people can go to learn how to build stuff. If you want to build a company, nothing better than jumping in and trying to build one. But Facebook is also great for entrepreneurs/hackers. If people want to come for a few years and move on and build something great, that's something we're proud of.

I like to pride myself on thinking pretty long term, but not that long term.

I do everything on my phone as a lot of people do.