"This natural law, being as old as mankind and dictated by God himself, is of course superior in obligation to any other. It is binding over all the globe, in all countries, and at all times: no human laws are of any validity, if contrary to this; and such of them as are valid derive all their force, and all their authority, from this original.”
-- William Blackstone, Commentaries on the Law of England (1765)
"The instruments, by which [government] must act, are either the authority of the Laws or force. If the first be destroyed, the last must be substituted; ... and where this becomes the ordinary instrument of government, there is an end to liberty."