If you look at academic studies, you can see that stock prices are most closely correlated with cash flow. It's such a straightforward number. Cash flow is what will drive shareholder returns.

Do something you're very passionate about, and don't try to chase what is kind of the "hot passion" of the day.

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

We also have no incentive compensation of any kind. And the reason we don’t is because it is detrimental to teamwork.

I knew that if I failed I wouldn't regret that, but I knew the one thing I might regret is not trying.

I went to Princeton specifically to study physics.

To get something new done you have to be stubborn and focused, to the point that others might find unreasonable.