Discourses: Book 3 7 : 4
In a piece of plate what is the best thing, the silver or the art? The substance of the hand is mere flesh, but the important thing is the works of the hand. Now duties are of three kinds; first, those that have to do with mere existence, second, those that have to do with existence of a particular sort, and third, the principal duties themselves. So also in the case of man, it is not his material substance that we should honour, his bits of flesh, but the principal things. What are these? The duties of citizenship, marriage, begetting children, reverence to God, care of parents, in a word, desire, avoidance, choice, refusal, the proper performance of each one of these acts, and that is, in accordance with our nature. And what is our nature? To act as free men, as noble, as self-respecting. Why, what other living being blushes, what other comprehends the impression of shame? And it is our nature to subordinate pleasure to these duties as their servant, their minister, so as to arouse our interest and keep us acting in accordance with nature.