The means by which the existence of an animal is sustained, requires a designer in no greater degree than the existence itself of the animal. If it exists, there must be means to support its existence. In a world where omne mutatur nihil interit, no organized being can exist without a continual separation of that substance which is incessantly exhausted, nor can this separation take place otherwise, than by the invariable laws which result from the relations of matter. We are incapacitated only by our ignorance from referring every phenomenon, however unusual, minute or complex, to the laws of motion and the properties of matter; and it is an egregious offence against the first principles of reason, to suppose an immaterial creator of the world, in quo omnia moventur sed sine mutuâ passione; which is equally a superfluous hypothesis in the mechanical philosophy of Newton, and an useless excrescence on the inductive logic of Bacon.
What then is this harmony, this order which you maintain to have required for its establishment, what it needs not for its maintenance, the agency of a supernatural intelligence? Inasmuch as the order visible in the Universe requires one cause, so does the disorder whose operation is not less clearly apparent, demand another. Order and disorder are no more than modifications of our own perceptions of the relations which subsist between ourselves and external objects, and if we are justified in inferring the operation of a benevolent power from the advantages attendant on the former, the evils of the latter bear equal testimony to the activity of a malignant principle, no less pertinacious in inducing evil out of good, than the other is unremitting in procuring good from evil.
