I look at Google and think they have a strong academic culture. Elegant solutions to complex problems.

Whenever I go to a new city, in order to help get on the right time zone and actually get a chance to see that city, I like running.

People at Facebook are fairly used to the press being nice to us or not nice to us.

Berlin definitely has one of the most vibrant of the startup scenes that I have seen. Not really just across Europe, but across the whole world in terms of cities. It's an interesting dynamic.

The unsupervised learning is the way most people will learn in the future. You have this model of how the world works in your head and you're refining it to predict what you think is going to happen in the future.

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

[Facebook] is shaping a broader web. If you look back for the past five or seven years, the story about social networking has really been about getting people connected... But if you look forward for the next five years, I think that the story people are going to remember five years from now isn't how this one site was built; it is how every single service that you use is now going to be better with your friends.