We change our tools and then our tools change us.

There are multiple ways to be externally focused that are very successful. You can be customer-focused or competitor-focused. Some people are internally focused, and if they reach critical mass, they can tip the whole company.

If you don't understand the details of your business you are going to fail.

If there’s one reason we have done better than of our peers in the Internet space over the last six years, it is because we have focused like a laser on customer experience.

The thing about inventing is you have to be both stubborn and flexible. The hard part is figuring out when to be which.

Mediocre theoretical physicists make no progress. They spend all their time understanding other people's progress.

We are pioneers and the history of pioneers is not that good.