完美数如同完美的人一样，非常罕见。
Iteration is the key to innovation. You have to keep refining and improving your ideas until they work.
在社会的初期，国家的首领塑造其制度；后来，制度塑造国家的首领。
种树的最佳时间是25年前，第二好的时间是今天。
Economic growth must be inclusive to be sustainable.
When I got tired, I slept. When I got hungry, I ate. When I had to go, you know, I went.
The Langlands program is a reflection of the beauty and depth of mathematical thought.
