A good mathematician is one who can see analogies between theorems; a great mathematician is one who can see analogies between analogies.

The most powerful art is that which makes us uncomfortable, that forces us to confront what we'd rather ignore.

释义：人的一生在于勤奋，不努力探索，哪会有收获? 

所谓道德抑或不道德的书是不存在的。书就只有分写得好、写得差，仅此而已。

质量从来不是偶然的；它始终是智慧努力的结果。