关于自由市场最重要的一个核心事实是，除非双方都受益，否则交易不会发生。

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.

释义：通过分析物品的过剩与短缺，就能判断其价值的高低。这句话揭示了市场供求关系对价格的影响。

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

你必须花费一些精力和努力才能看到数学的美。