Mathematics is the art of giving the same name to different things.
写作是一种自由行为,而自由对那些想要控制思想的人来说总是危险的。
You have to be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.
真正的无知不是知识的缺乏,而是拒绝获取知识。