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.

"The true alchemists do not change lead into gold; they change the world into words."

I believe it's essential to understand the psychology of the market and the psychology of the investor.

逻辑学研究不仅仅是关于推理规则，而是关于推理本身的本质。

我们观察到的不是自然本身，而是自然暴露于我们提问方法下的样子。