如果上帝要让人人都一样的话，他会给每人一双脚撑。
If God intended everybody to be the same, he'd have given us all braces on our legs.
幸福的秘诀是自由，而自由的秘诀是勇气。
The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
自守表示的研究是数学抽象之美的反映。
He who fights with monsters should be careful lest he thereby become a monster.