I like to pride myself on thinking pretty long term, but not that long term.

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.

I mean, we've built a lot of products that we think are good, and will help people share photos and share videos and write messages to each other. But it's really all about how people are spreading Facebook around the world in all these different countries. And that's what's so amazing about the scale that it's at today.

Having two identities for yourself is an example of a lack of integrity.

Books allow you to fully explore a topic and immerse yourself in a deeper way than most media today. I'm looking forward to shifting more of my media diet towards reading books.

The ability to share whole scenes form our lives will be a valuable thing over time.

Don't discount yourself, no matter what you're doing.