We have these services that people love and that are drivers of data usage... and we want to work this out, so that way, it's a profitable model for our partners.

We pay attention to every demographic in every country, so we're going to focus on building things that teens are going to like, and we're also going to focus on building things that other folks are going to like.

Facebook was not originally created to be a company. It was built to accomplish a social mission - to make the world more open and connected.

At Facebook, we build tools to help people connect with the people they want and share what they want, and by doing this we are extending people's capacity to build and maintain relationships.

If you just work on stuff that you like and you’re passionate about, you don’t have to have a master plan with how things will play out.

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

Our goal is to make it so there's as little friction as possible to having a social experience.

Facebook is really about communicating and telling stories... We think that people can really help spread awareness of organ donation and that they want to participate in this to their friends. And that can be a big part of helping solve the crisis that's out there.

The biggest risk is not taking any risk... In a world that changing really quickly, the only strategy that is guaranteed to fail is not taking risks.

I do love email. Wherever possible I try to communicate asynchronously. I'm really good at email.

You need to live in a dome initially, but over time you could terraform Mars to look like Earth and eventually walk around outside without anything on... So it's a fixer-upper of a planet.

Boeing just took $20 billion and 10 years to improve the efficiency of their planes by 10 percent. That's pretty lame. I have a design in mind for a vertical liftoff supersonic jet that would be a really big improvement.

I don't create companies for the sake of creating companies, but to get things done.

Tesla is here to stay and keep fighting for the electric car revolution.

I say something, and then it usually happens. Maybe not on schedule, but it usually happens.

Really, the only thing that makes sense is to strive for greater collective enlightenment.

People should pursue what they're passionate about. That will make them happier than pretty much anything else.

I think it matters whether someone has a good heart.

Tesla is becoming a real car company.

I think you should always bear in mind that entropy is not on your side.