Economics is at its best when it helps us solve real-world problems in a rigorous and transparent way.

The secret of change is to focus all of your energy not on fighting the old, but on building the new.

善是无法定义的。

译文：与其在生病后去求取药物，不如在生病前做好自我的预防。赏析：任何事都要提前谋划，防患未然，事到临头才不会手忙脚乱。平时不烧香，临时抱佛脚是没有用的。

An eye for an eye will only make the whole world blind.

量子密码学不是关于保守秘密，而是知道何时有人试图窃取它们。

富人与你我不同。