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.

科学突破往往来自意外的发现——保持好奇心。

国君得到了我的学说，就必然会采用。 

最好的书是那些告诉你你已经知道的东西的书。