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:

Life is like a mirror, if you frown at it, it frowns back; if you smile, it returns the greeting.

We must be free not because we claim freedom, but because we practice it.

大钱不在于买卖，而在于等待。

预测未来的最好方法就是创造未来。