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.

Google, I think, in some ways, is more competitive and certainly is trying to build their own little version of Facebook.

Move fast and break things. Unless you are breaking stuff, you are not moving fast enough.

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.

It occurred to me that building a company was the best way to align a group of people towards building something great. And its really... it's a good organizational structure where you can really reward people. If they're building something that's good, you can you work with partners and reward them if the product that you're developing work well. It's a good way to get the best people involved to build something very good.

If people want change, then they will find a way to get that change. So, whatever technology they may or may not have used was neither a necessary nor sufficient case for getting to the outcome that they got to, but having people who wanted change was.

Our goal is not to build a platform; it's to be cross all of them.