Concerning the utility of Rhetoric, it is to be observed that it divides itself into two; first, whether Oratorical skill be, on the whole, a public benefit, or evil; and secondly, whether any artificial system of Rules is conducive to the attainment of that skill. Richard Whately
Every discourse, even a poetic or oracular sentence, carries with it a system of rules for producing analogous things and thus an outline of methodology. Jacques Derrida
Law is an order of human behavior. An "order” is a system of rules. Law is not, as it is sometimes said, a rule. It is a set of rules having the kind of unity we understand by a system. It is impossible to grasp the nature of law if we limit our attention to the single isolated rule. Hans Kelsen
I still don't like authority exercised without reason. But they laugh at you at Cambridge if you say that sort of thing. For them, the law is a system of rules not that different from mathematics. John Lloyd