每本书都是一句引文；每座房子都是从所有森林、矿山和采石场中引用的；每个人都是从他所有祖先中引用的。

I hope that in this year to come, you make mistakes. Because if you are making mistakes, then you are making new things, trying new things, learning, living, pushing yourself, changing yourself, changing your world.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

Let’s face it, a nice creamy chocolate cake does a lot for a lot of people; it does for me.　　

每一个发现都为成千上万的新问题打开了大门。