"I think that if you're building a product that's going to serve billions of people, you need to think about the impact that it's going to have on the world."

"When I look at the world, I just see so many problems that need to be solved."

"The question I ask myself like almost every day is, 'Am I doing the most important thing I could be doing?'"

"I think that the future is going to be built by people who are willing to take risks."

"I remember I had a friend who was a photographer, and he posted his photos on his personal website, and I was like, 'Dude, you should just put these on Facebook.'"