The only meat I eat is from animals I've killed myself.

The companies that work are the ones that people really care about and have a vision for the world so do something you like.

Almost any mistake you can make in running a company, I've probably made

I think that people just have this core desire to express who they are. And I think that's always existed.

It only took me two weeks to build the first version of Facebook because I had so much stuff before then.

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.

A squirrel dying in front of your house may be more relevant to your interests right now than people dying in Africa.