The joy of discovery is what drives mathematicians forward.

The study of mathematics is the indispensable basis for all intellectual and spiritual progress.

"The silence around words is as important as the words themselves."

可持续林业不是成本，而是对我们未来的投资。

正所谓“物以类聚，人以群分”，自己处在什么样的圈子里，自己一定有这个圈子的特点。自身的荣辱祸福都是由自己的行为决定的。比如，两堆柴火堆放的样子差不多，但是火星总是容易在干的那一堆里着起火。很多时候我们抱怨别人和不顺心的事，然而往往是自身的问题。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.