But the human mind can never rest in the bare knowledge of phenomena. The reason intuitively recognizes the uniformities of nature as the suggestive signs of properties or powers which are not perceptible to sense, and the question arises, _How_--that is, from what adjustment of antecedent conditions and physical agencies--does the order of nature arise? And now the term law comes to indicate more than an observed order of facts; it denotes an order resulting from the coincidence of some permanent properties, qualities, or forces which are conceived as lying back of the phenomena, and pushing them into the objective field. Accordingly, laws are now defined as "_the necessary relations which spring from the [inner] nature of things_."[252] Here the phrase is taken _subjectively_, as the expression of a mental conception, and not of a sense perception. "It has relation to us as _understanding_, rather than to the materials of which the universe consists as obeying certain rules."[253] Finally, the human mind approaches the question--_Why_ have these physical agencies been so collocated or adjusted? What relation does this adjustment bear to _purpose_, _intention_, or _end_? Law is now _the reason or end for which an orderly arrangement exists_. Here the phrase is taken ideally or _rationally_ as a revelation of the intuitive reason, in the light of which the phenomena of nature find their only satisfactory interpretation. By this route we are led back to the primary and universal conception of law as "_the idea of the Reason enforced by Power_." All government, human or Divine, is the enforcement of ideas by authority, and "Natural Law" is the actualization of the Divine idea by the Divine efficiency. As Bunsen remarks, "Law is the supreme rule of the universe, and this law is Intellect, is _Reason_, whether viewed in the formation of a planetary system or the organization of a worm." Laws and ideas are thus correlated. Viewed in respect to the reason as conceiving, originating, and projecting, we speak of the _idea_. Viewed in respect to the sphere of determinate movement and action in which ideas are realized and actualized, we speak of _law_. Hence Plato often calls ideas laws; and Lord Bacon, the British Plato, describes the laws of the material world as ideas: "_Quod in naturâ naturatâ lex, in naturâ naturante idea dicitur_."