A lot of the Google inventions came from engineers just screwing around with ideas. And then management would see them, and we'd say, 'Boy, that's interesting. Let's add some more engineers.'

It's very difficult for governments to dominate the Internet because it's so difficult to control. People want to be free. People want to hear multiple voices. They want to make their own decisions. And people who see things will report things.

Do not be afraid to fail, but also, do not be afraid to succeed.

If you have something that you don't want anyone to know, maybe you shouldn't be doing it in the first place.

There is a science to managing high tech businesses, and it needs to be respected. One of them is that in technology businesses, leadership is temporary. It's constantly recycling. So the asset has limited lifetime.

I've never met a person who does not want a safer world, better medical care and education for their children, and peace with their neighbours. I just don't meet those people. What I meet, over and over again, as I travel around, is that the essential human condition is optimistic - in every one of these places.

The funny thing about advertising is that it's not a zero-sum game... Historically, in the digital ad world, pie has gotten larger and it's possible for everyone to win, and it's perfectly possible that will continue to be true for quite some time.