Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility this gives of systematically making them work towards definite ends.

你必须活在当下。

Every ton of aggregate we produce carries the weight of responsibility—to our customers and our communities.

数学是一种超越文化和语言障碍的通用语言。

家庭是文明的核心。

不要怜悯死者，哈利。怜悯生者，尤其是那些没有爱的人。