The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
Train people well enough so they can leave, treat them well enough so they don't want to.
当你开始考虑如果你输了你会做什么的那一刻,你就已经输了。
释义:与心意相投的朋友在一起,心里不会感到厌倦;与理解你的人交谈,会有说不完的话。