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:

It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary.

Hope is not an emotion, but a choice.

Sometimes you have to be alone to truly find yourself.

我感激每一个给予我的机会。

数学的进步不仅仅依靠个人的努力，而是通过几代人的集体工作。

Will you be clever at the expense of others， or will you be kind？

The only way out is through.

I don't have any sense of myself except as an actor.