What surely is most needed in order to make men clear-sighted in confronting the official abuse of power, is that they should preserve the sense that the certification of something as legally valid is not conclusive of the question of obedience, and that, however great the aura of majesty or authority which the official system may have, its demands must in the end be submitted to a moral scrutiny.

H. L. A Hart, The Concept of Law, loc. 502