试图在不激发学生学习欲望的情况下进行教学的老师，就像在冷铁上敲打。

以耗尽地球为代价的利润根本不是利润。

A good mathematician is someone who can see analogies between theorems. A great mathematician is someone who can see analogies between analogies.

To read is to travel, to travel to other places, to other times, to other minds.

没有理由说善不能像恶一样经常胜利。任何事物的胜利都是组织的问题。