Everything is hard before it is easy. The day before something is a breakthrough, it’s a stupid idea.
"Every word carries the weight of its history."
The beauty of mathematics is that it is both an art and a science.
顾客可能不总是对的,但他们永远是顾客。
自由之树需要经常用爱国者和暴君的鲜血来浇灌。
不可能与可能之间的区别在于一个人的决心。