“每件事物的真实价格，即每件事物对想要获得它的人来说真正付出的代价，就是获得它所付出的辛劳和麻烦。”
所收录版本的文本 · 英语
“The real price of every thing, what every thing really costs to the man who wants to acquire it, is the toil and trouble of acquiring it.”
— 亚当·斯密, An Inquiry into the Nature and Causes of the Wealth of Nations