“I give my whole water in joy，“ sings the waterfall， '' though little of it is enough for the thirsty。''

We are what we pretend to be, so we must be careful about what we pretend to be.

And when you do I want you to know this， remember this: there is no such thing as failure. Failure is just life trying to move us in another direction. Now when you’re down there in the hole， it looks like failure. So this past year I had to spoon feed those words to myself.

We must invest in people as much as we invest in technology; both are essential to progress.

I don’t think you should ever feel like you’ve achieved everything. You always have to keep pushing.

To write is to resist.

数学的美在于它允许我们抽象出现实世界的复杂性，专注于基本原则。