优秀的数学家不是知道所有答案的人，而是能提出正确问题的人。

Behavior is governed by the same laws in humans and animals.

Everything is hard before it is easy. The day before something is a breakthrough， it’s a stupid idea.

People change and forgot to tell each other.

你爱得越多，你就能爱得越多——而且你爱得越强烈。