Misery is evil; quarreling, a misfortune. There is only one possibility of avoiding both: a clear division of society. [Otherwise] the strong tyrannize the weak, the intelligent frighten the stupid, the inferior resist the superior, and the young mock the old.

Men of all social stations live together: they are equal in their desires, yet vary in their methods; they are equal in their passions, yet different in their intelligence; that is their nature-given vitality.

The petty man is eager to make boasts, yet desires that others should believe in him. He enthusiastically engages in deception, yet wants others to have affection for him. He conducts himself like an animal, yet wants others to think well of him.

If the blood humor is too strong and robust, calm it with balance and harmony.

Now it is human nature to want to eat to ones fill when hungry, to want to warm up when cold, to want to rest when tired. These all are a part of people's emotional nature.

Pride and excess bring disaster for man.

Tell me and I forget. Teach me and I remember. Involve me and I learn.