Everything can be taken from a man but one thing: the last of the human freedoms—to choose one's attitude in any given set of circumstances.

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.

我是一个女人，我有不完美之处……我为此感到自豪。

我们越擅长变得更好，我们就会变得越快更好。

智力的衡量标准是改变的能力。

The way we perceive the world is heavily influenced by our past experiences and current expectations.