In mathematics, you don't understand things. You just get used to them.
世界上充满了自童年起就再未以开放心灵面对开放门户的人。
历史学家必须兼具诗人和哲学家的特质。
Being powerful is like being a lady. If you have to tell people you are, you aren't.
"The best way to predict the future is to create it."