If your customer base is aging with you, then eventually you are going to become obsolete or irrelevant. You need to be constantly figuring out who are your new customers and what are you doing to stay forever young.

We've done price elasticity studies, and the answer is always that we should raise prices. We don't do that, because we believe -- and we have to take this as an article of faith -- that by keeping our prices very, very low, we earn trust with customers over time, and that that actually does maximize free cash flow over the long term.

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.

For every leader in the company, not just for me, there are decisions that can be made by analysis. These are the best kinds of decisions!

One of the things that I hope will distinguish Amazon.com is that we continue to be a company that defies easy analogy. This requires a lot of innovation, and innovation requires a lot of random walk.

All businesses need to be young forever. If your customer base ages with you, you're Woolworth's.

It's not an experiment if you know it's going to work.