Society is divided into mental labor and manual labor.

Hard-working people govern others, hard-working people govern others;

The rule of man eats people, and the rule of man eats people is universal.

Explanation:

So,

Some people do mental work, others do manual work,

People who do mental work manage people who do manual work,

People who do manual labor are managed by people who do mental labor.

The managed people support the manager, and the manager is supported by manual workers.

This is a universal principle.

This paragraph is about the social division of labor between manual labor and mental labor.

Society needs this,

You can't say that mental work is either labor or exploitation.

Many people can't understand that others pay mental work, and only think that manual work is labor, which is pure ignorance and ignorance. It is foolish and bad to use this to talk about trifling.