What really motivates people at Facebook is building stuff that they're proud of.

When you want to change things, you can't please everyone. If you do please everyone, you aren't making enough progress.

When people are connected, we can just do some great things. They have the opportunity to get access to jobs, education, health, communications. We have the opportunity to bring the people we care about closer to us.

I personally don't invest in a lot of companies because I think it would be a conflict of interest and Facebook doesn't typically either.

I generally think if you do good things for people in the world, that comes back and you benefit from it over time.

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.

It is really important for us that people understand what the strategy is and that the real approach is to make everything social, not to build a vertical approach.