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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.

It was like when you make a move in chess and just as you take your finger off the piece, you see the mistake you’ve made, and there’s this panic because you don’t know yet the scale of disaster you’ve left yourself open to.

閱讀是所有學習的基礎。

在你的生活中，有幾個地方，或者可能只有一個地方，發生了某件事，然后還有其他所有地方。

We must listen to science, but also to communities—real solutions are found at the intersection of data and human need.

我不習慣吹噓或談論我所做的事情。我更喜歡人們只是看我比賽，然后做出自己的判斷。