数学家是能在定理之间找到类比的人；更好的数学家是能在证明之间看到类比的人；而最好的数学家是能注意到理论之间类比的人。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
当官从政，首先要使民风民俗敦厚；处理事务，首先要抓住问题的本质。
只要你能坚持一步一步往前走，你几乎可以度过任何难关。