 Both the city and the household have an analogy with the body of the human being. The body is composed of different parts …, each doing a certain action, so that from all their actions they come together in mutual assistance to perfect the purpose of the human being’s body. In the same way, both the city and the household are composed of different parts of a definite number …, each performing on its own a certain action, so that from their actions they come together in mutual assistance to perfect the purpose of the city or the household. (Selected Aphorisms 25: 23)