The question I ask myself like almost every day is: ‘Am I doing the most important thing I could be doing?' Unless I feel like I’m working on the most important problem that I can help with, then I’m not going to feel good about how I’m spending my time. And that’s what this company is.

The question I ask myself like almost everyday is 'Am I doing the most important thing I could be doing?

The most important thing is to keep your team as small as possible.

I'm trying to make the world a more open place by helping people connect and share.

Helping a billion people connect is amazing, humbling and by far the thing I am most proud of in my life.

By giving people the power to share, we're making the world more transparent.

Companies face a handful of different risks, whether it is competitors or different market environments. But I think that people focus way too much on competitors and not enough on their own execution

We look for people who are passionate about something. In a way, it almost doesn’t matter what you’re passionate about. What we really look for when we’re interviewing people is what they’ve shown an initiative to do on their own.

What Facebook stands for in the world is giving people a voice and spreading ideas and rationalism.

Every application will be designed from the ground up to use real identity and friends.

Our mission is to make the world more open and connected. We do this by giving people the power to share whatever they want and be connected to whoever they want, no matter where they are.

I think as a company, if you can get two things right--having a clear direction on what you are trying to do and bringing in great people who can execute on the stuff--then you can do pretty well.

All of my friends who have younger siblings who are going to college or high school - my number one piece of advice is: You should learn how to program.

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.

I started the site when I was 19. I didn't know much about business back then.

Mobile is a lot closer to TV than it is to desktop.

I know it sounds corny, but I’d love to improve people’s lives, especially socially… Making the world more open is not an overnight thing. It’s a ten-to-fifteen-year thing.

The thing that we are trying to do at Facebook is just help people connect and communicate more efficiently.

We also have a dog. His name's Beast. He's a sheepdog. He's super cute. I love him.