In this cautious proceeding of the astronomers, you may read your own condemnation, Cleanthes; or rather may see, that the subject in which you are engaged exceeds all human reason and inquiry. Can you pretend to show any such similarity between the fabric of a house, find the generation of a universe? Have you ever seen nature in any such situation as resembles the first arrangement of the elements? Have worlds ever been formed under your eye; and have you had leisure to observe the whole progress of the phenomenon, from the first appearance of order to its final consummation? If you have, then cite your experience, and deliver your theory. [1] Recherche de la Verité, liv. 3, cap. 9. PART III. How the most absurd argument, replied Cleanthes, in the hands of a man of ingenuity and invention, may acquire an air of probability! Are you not aware, Philo, that it became necessary for Copernicus and his first disciples to prove the similarity of the terrestrial and celestial matter; because several philosophers, blinded by old systems, and supported by some sensible appearances, had denied this similarity? but that it is by no means necessary, that Theists should prove the similarity of the works of Nature to those of Art; because this similarity is self-evident and undeniable? The same matter, a like form; what more is requisite to show an analogy between their causes, and to ascertain the origin of all things from a divine purpose and intention? Your objections, I must freely tell you, are no better than the abstruse cavils of those philosophers who denied motion; and ought to be refuted in the same manner, by illustrations, examples and instances, rather than by serious argument and philosophy. Suppose, therefore, that an articulate voice were heard, in the clouds, much louder and more melodious than any which human art could ever reach: Suppose, that this voice were extended in the same instant over all nations, and spoke to each nation in its own language and dialect: Suppose, that the words delivered not only contain a just sense and meaning, but convey some instruction altogether worthy of a benevolent Being, superior to mankind: Could you possibly hesitate a moment concerning the cause of this voice? and must you not instantly ascribe it to some design or purpose? Yet I cannot see but all the same objections (if they merit that appellation) which lie against the system of Theism, may also be produced against this inference.