Simply put: we don't build services to make money; we make money to build better services.

Connectivity just can't be a privilege for people in the richest countries. We believe that connecting everyone in the world is one of the great challenges of our generation, and that's why we are happy to play whatever small part in that that we can.

Facebook is inherently viral. There are lots of sites that include a contact importer, and for lots of them it doesn't really make sense. For Facebook it fits so well. It wasn't until a few years in that we started building some tools that made it easier to import friends to the site. That was a huge thing that spiked growth.

Don't discount yourself, no matter what you're doing. Everyone has a unique perspective that they can bring to the world.

I look at Google and think they have a strong academic culture. Elegant solutions to complex problems.

A guy who makes a new chair doesn't owe money to everyone who ever built a chair.

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.