所有没有杀掉我的就只会令我更顽强！
经济学方法为理解所有人类行为提供了一个有价值的统一框架。
大海是一面镜子，映照出凝视它的人的灵魂。
Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves.
