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:
幸福的幸里面是一个“幸”,不是一个“辛”。  或者理解成,Y=Why=为什么,I=我。幸福里面没有为什么,只有我。 
我从不担心行动。而只担心没有任何行动。
"To write is to bear witness to the human condition."
In mathematics, the journey is often more important than the destination.
Silence in cinema can be more powerful than any dialogue.