There is then in all persons a natural impetus to associate with each other in this manner, and he who first founded civil society was the cause of the greatest good; for as by the completion of it man is the most excellent of all living beings, so without law and justice he would be the worst of all, for nothing is so difficult to subdue as injustice in arms: but these arms man is born with, namely, prudence and valour, which he may apply to the most opposite purposes, for he who abuses them will be the most wicked, the most cruel, the most lustful, and most gluttonous being imaginable; for justice is a political virtue, by the rules of it the state is regulated, and these rules are the criterion of what is right..