世界这么大，人生这么长，总会有这么一个人，让你想要温柔地对待。

治理天下的人，就像牧马的人一样，关键是要除去害群之马。

世界是一本书，不旅行的人只读了一页。

I always try to be positive, even in difficult moments.

A mathematician's work is mostly a solitary pursuit, but it builds on the work of many others.