"[I]t behooves Us above all else to call to mind that firmly established principle, esteemed alike in sound philosophy and sacred theology: namely, that whatever things have deviated from their right order cannot be brought back to that original state which is in harmony with their nature except by returning to the divine [[plan which, as the Angelic Doctor teaches, is the exemplar of all right order. Wherefore, Our Predecessor of happy memory, Leo XIII, attacked the doctrine of the naturalists in these words: "It is a divinely appointed law that whatsoever things are constituted by God, the Author of nature, these we find the more useful and salutary, the more they remain in their natural state, unimpaired and unchanged inasmuch as God, the Creator of all things, intimately knows what is suited to the constitution and the preservation of each, and by His will and mind has so ordained all things that each may duly achieve its purpose. But if the boldness and wickedness of men change and disturb this order of things, so providentially disposed, then indeed things so wonderfully ordained will begin to be injurious, or will cease to be beneficial, either because in the change they have lost their power to benefit, or because God Himself is thus pleased to draw down chastisement on the pride and presumption of men.”"