Optimism is important. You have to be a little silly about the goals you are going to set. There is a phrase I learned in college called, 'having a healthy disregard for the impossible.' That is a really good phrase. You should try to do things that most people would not do.

The moments that we have with friends and family, the chances that we have to make a big difference in the world or even to make a small difference to the ones we love, all those wonderful chances that life gives us, life also takes away. It can happen fast and a whole lot sooner than you think.

My job as a leader is to make sure everybody in the company has great opportunities, and that they feel they're having a meaningful impact and are contributing to the good of society. As a world, we're doing a better job of that. My goal is for Google to lead, not follow that.

You never lose a dream, it just incubates as a hobby.

Lots of companies don't succeed over time. What do they fundamentally do wrong? They usually miss the future.

We should be building great things that don't exist.

Small groups of people can have a really huge impact.