Berlin is one of my favorite cities in the world. I feel like the energy is very youthful. It has such an important history, including its recent history of unification.

I don't hate anybody. The Winklevi aren't suing me for intellectual property theft. They're suing me because for the first time in their lives, the world didn't work the way it was supposed to for them.

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

When I'm introspective about the last few years I think the biggest mistake that we made, as a company, is betting too much on HTML5 as opposed to native... because it just wasn't there. And it's not that HTML5 is bad. I'm actually, on long-term, really excited about it. One of the things that's interesting is we actually have more people on a daily basis using mobile Web Facebook than we have using our iOS or Android apps combined. So mobile Web is a big thing for us.

Of course, hate speech and racism have no place on Facebook

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

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