任何经济理论的最终检验标准是它是否能改善现实世界的决策。
The ultimate test of any economic theory is whether it improves real-world decisions.
"The beauty of science is that it allows us to understand the world in a way that is both profound and practical."
艺术中没有错误，只有意外的发现。
In the end, we will remember not the words of our enemies, but the silence of our friends.
"I never guess. It is a shocking habit—destructive to the logical faculty."