"The quest for efficient algorithms is a journey through the landscape of mathematical possibility."

The privilege of a lifetime is being who you are.

外交是通过妥协达成双赢的结果，而不是通过对抗来追求胜利。

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.