IV. Knowledge of the Human Being According to Body, Soul or Spirit, Brain and Thinking — The Liver as a Sensory Organ
From this you can also see that classes of people are really forming. In life, what is in life must also be applied. So if there is a science that cannot be applied, an useless science, then the people who pursue this science are also useless in a certain sense, and then an useless class of people arises. There you have the class differences.
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