It matters little, with reference to our present purpose, whether or not every department of Nature be supposed to be equally subject to "natural laws;" for even were it so, still if these laws were either in part unknown and undiscoverable by us, or so related to each other that the results of their manifold possible combinations could not be calculated or reckoned on by human wisdom or foresight, ample room would be left for the exercise of _diligence_ within the limits of our ascertained knowledge, and yet for a sense of _dependence_ on a power which we feel ourselves unable either to comprehend or control. On the ground of analogy, we think it highly probable that every department of Nature _is_ subject to regular and stable laws; and on the same ground we may anticipate that, in the progressive advance of human knowledge, many new fields will yet be conquered, and added to the domain of Science. But suppose every law were discovered,--suppose, even, that every individual event should be shown to depend on some natural cause, there would still remain at least _two_ considerations which should remind us of our _dependence_. The first is our ignorance of the whole combination of causes which may at any time be brought into action, and of the results which may flow from them in circumstances such as we can neither foresee nor provide against. The second is our ignorance, equally unavoidable and profound, of the intelligent and voluntary agencies which may be at work, modifying, disposing, and directing that combination of causes, so as to accomplish the purposes of the Omniscient Mind. Our want of knowledge in either case is a reason for uncertainty; and our uncertainty in regard to events in which we may be deeply concerned is fitted to teach us our dependence on a higher Power. Let it not be thought, however, that our argument for God's Providence is drawn merely from man's _ignorance_, or that its strength must diminish in proportion as his knowledge of Nature is extended; on the contrary, it rests on the assumption that _man knows enough to be aware that he cannot know all_, and that as long as he is not omniscient, he must be dependent on Him who alone "knows the end from the beginning," and "who ruleth among the armies of heaven" as well as "among the inhabitants of this earth."