"I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better."

"We want to make sure that Google is helping people do things that are important for them."

"We're trying to build a perfect search engine. It would understand everything in the world."

"The internet is a vast, unorganized library. We're trying to organize it."

"We want to build things that are important, that really matter to people."