When people are connected, we can just do some great things. They have the opportunity to get access to jobs, education, health, communications. We have the opportunity to bring the people we care about closer to us.

When you give people ability to stay connected with all the people they care about, and you make it so they can express new things about themselves or in communication with other people who they care about, then you just open up new possibilities. You make it so people can stay connected in ways that they couldn't before.

Find that thing you are super passionate about. A lot of founding principles of Facebook are that if people have access to more information and are more connected, it will make the world better; people will have more understanding, more empathy. That’s the guiding principle for me. On hard days, I really just step back, and that’s the thing that keeps me going.

I think people tend to be worried about every new technology that comes along.

I think a simple rule of business is, if you do the things that are easier first, then you can actually make a lot of progress.

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

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