The natural demands the supernatural; so also does the supernatural demand the natural. If there were no nature, there could be nothing above nature; there would be nothing for grace to operate on, to assist, or complete. If man had no reason, he could receive no revelation; if he had no free-will, he could have no virtue, no sanctity; if not generated, he could not be regenerated; and if not regenerated, he could not be glorified, or attain to the end for which he is intended. To deny nature is to deny the creative act of God, and to fall into pantheism--a sophism, for pantheism is denied in its very assertion. Its assertion implies the assertor, and therefore something capable of acting, and therefore a substantive existence, distinguishable from God. The denial of God, as creator, is the denial alike of man, the natural, and the supernatural. To solve the problem, and remove the dualism which bisects the modern mind, it is necessary to study the Creator's works in the light of the Creator's plan, and as a whole, in the whole course or itinerary of their existence, or in their procession from him as first cause, to their return to him as final cause, and not piecemeal, as isolated or unrelated facts. If we know not this plan, which no study of the works themselves can reveal to us, we can never get at the meaning of a single the smallest part, far less attain to any thing like the science of the universe; for the meaning of each part is in its relation to the whole. What is the meaning of this grain of sand on the sea-shore, or this mosquito, this gnat, these animalculæ invisible to the naked eye? Have they no meaning, no purpose in the Creator's plan? What can you, by reason, know of that purpose or meaning, if you know not that plan? Your physical sciences, without a knowledge of that plan, are no sciences at all, and give you no more conception of the universe than a specimen brick from its walls can give you of the city of Babylon.