我不相信遗憾。遗憾是浪费时间。它们是过去在现在束缚你。
Mathematics is the art of giving the same name to different things.
The world is changed by your example, not by your opinion.
我既找不到一个完全献身于我的朋友,我就必须有些能以其推动力克服我的惰性的朋友。
Some people don't like change, but you need to embrace change if the alternative is disaster.