Never let failure define you. Use it as a stepping stone to something better.

The best time to plant a tree was twenty years ago. The second best time is now.

We are not born for ourselves alone.

I’m the kind of guy who’ll wake up and bake up, then watch the same DVD all day.

一个好的数学家是能看到定理之间类比的人；一个伟大的数学家是能看到类比之间的类比的人。

Auction design is as much about psychology as it is about mathematics.