Every word carries the weight of all the words that could have been spoken instead.

一件事情都不能做到有始有终，就不要去操持其他的事情;一物也不明白，就不要追求博闻广记。

【译文】爱好学习的人如同禾苗稻谷一样都是有用的，不爱学习的人则像蒿草一样没有什么用处，只配当柴火来烧。

Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics:

INDUSTRY. Lose no time; be always employ’d in something useful; cut off all unnecessary actions.