数学的本质在于它的自由。
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.
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。
The beauty of mathematics is that it is universal.
Theorems are the milestones of mathematics.
The best way to learn mathematics is to do mathematics.
学习数学的最好方法就是去做数学。
Mathematics is not a spectator sport. You have to do it to understand it.
数学不是一项观赏性运动。你必须亲自去做才能理解它。