"A squirrel dying in front of your house may be more relevant to your interests right now than people dying in Africa."

"I just want to build something that people find useful."

"We're trying to create a world where everyone can connect."

"I think we've been very clear that we stand for free expression."

"I'm not going to sit here and say that we've never made mistakes. We have. And the important thing is that we learn from those mistakes."