King is a title which translated into several languages, signifies a magistrate with as many different degrees of power as there are kingdoms in the world, and he can have no power but what is given him by law; yea, even the supreme or legislative power is bound by the rules of equity, to govern by laws enacted, and published in due form; for what is not legal is arbitrary.

A Supplement to the Miscellaneous Works of the Late Dr. Arbuthnot (ed. 1751)