The rule given about not seeking one’s own gain is established, first by the examples of Christ, next by the meaning of the word, and lastly by the very form and uses of our limbs. Wherefore the writer shows what a crime it is to deprive another of what is useful, since the law of nature as well as the divine law is broken by such wickedness. Further, by its means we also lose that gift which makes us superior to other living creatures; and lastly, through it civil laws are abused and treated with the greatest contempt.