当一扇门关闭时，你要知道，另一扇门正在打开。
When one door is closed, don't you know, another is open.
所有商品的交换价值随着生产难度的增加而上升。
We are all alone in this world, and we must find our own way.
In every problem, there is a hidden pattern waiting to be discovered, and it is our duty as mathematicians to uncover it.
解释：善于制造弓箭的工匠之子，必须先从编织簸箕开始；善于冶炼的工匠之子，必须从连缀皮裘开始。
一个文明的真正考验在于它如何对待最弱小的成员。
故事是与他人连接的方式。
I’ve learned over the years that the market is always right.