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'Instagram' can engage generations of people that may not be on Facebook yet. I think that's true with 'WhatsApp,' and I think that will be true with things like Oculus.

I believe Facebook is going all the way. They're going to reach a billion members and will be the biggest company in the world. It will be a platform everyone goes on the Internet through.

Building outrageous expectations about the next big thing - be it a personal video chatting service or venue-based photo sharing app - can create all sorts of complications when things don't go as planned.

Facebook has woven itself into the fabric of our lives and the foundation of the Internet. I think everything will be redefined because people are using their real identities on the Internet.

Facebook's the real deal. Nobody can buy Facebook now. Everybody has taken an angle at it. But Facebook may be the place that organizes everybody's personal information. It's got a very good chance of being that.

I hope that Facebook and other Internet technologies were able to help people, just like we hope that we help them communicate and organize and do whatever they want to every single day, but I don't pretend that if Facebook didn't exist, that this wouldn't even be possible. Of course, it would have.

WhatsApp will bring Facebook another billion users. We will be a billion-user product. Whether there is a direct valuation or an indirect valuation, there is value, and Facebook understands that well.

I love Facebook. I could brush my teeth with Facebook.

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.

I think social networking is absolutely here to stay. Now, whether or not the label will Facebook forever, depends in part, I think, on whether Facebook wants to try to be less proprietary, be more central to the operation of defining and stewarding identity online.