最好的投资是那些能够改变世界的人。

I think it's important to have a sense of humor about life.

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.

没有信仰的科学是瘸子，没有科学的信仰是瞎子。