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

A lot of people – and I’m just not one of them – believe that you should live for the now. I think what you do is think about the great expanse of time ahead of you and try to make sure that you’re planning for that in a way that’s going to leave you ultimately satisfied. This is the way it works for me.

If you do build a great experience, customers tell each other about that. Word of mouth is very powerful.

On the Internet, companies are scale businesses, characterized by high fixed costs and relatively low variable costs. You can be two sizes: You can be big, or you can be small. It's very hard to be medium. A lot of medium-sized companies had the financing rug pulled out from under them before they could get big.

We're not competitor obsessed, we're customer obsessed. We start with the customer and we work backwards.

The most important single thing is to focus obsessively on the customer. Our goal is to be earth's most customer-centric company.

Teachers, who are really good create that environment where you can be very satisfied by the process of learning. If you do something and you find it a very satisfying experience then you want to do more of it. The great teachers somehow convey in their very attitude and their words and their actions and everything they do that this is an important thing you're learning. You end up wanting to do more of it and more of it and more of it. That's a real talent some people have to convey the importance of that and to reflect it back to the students.