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.

精神工作导致的疲劳不是因为工作的数量，而是因为工作的质量。

当我们是大为谦卑的时候，便是我们最接近伟大的时候。