In a free society each person has a recognized private sphere, a protected realm which government authority cannot encroach upon. The purpose of law is to preserve freedom and moral agency. The rule of law is a meta-legal principle.
Also question is, what is the rule of law in simple terms?
rule of law. Word Origin. the principle that all people and institutions are subject to and accountable to law that is fairly applied and enforced; the principle of government by law.