It is thus that by force of metaphysical subtilty, mortals have no longer any fixed, any determinate idea of the beings to which they have given birth. But little contented with understanding physical causes, with contemplating active nature; weary of examining matter, which experience proves is competent to the production of every thing, man has been desirous to despoil it of the energy which it is its essence to possess, in order to invest it in a pure spirit; in an immaterial substance; which he is under the necessity of re-making a material being, whenever he has an inclination either to form an idea of it to himself, or make it understood by others. In assembling the parts of man, which he does no more than enlarge, which he swells out to infinity, he believes he forms an immaterial being, who, for that reason, acquires the capability of performing all those phenomena, with the true causes of which he is ignorant; nevertheless those operations of which he does comprehend the spring, he as sedulously denies to be due to the powers of this being; time, therefore, according to these ideas, as he advances the progress of science, as he further developes the secrets of nature, is continually diminishing the number of actions ascribed to this being--is constantly circumscribing his sphere of action. It is upon the model of the human soul that he forms the soul of nature, or that secret agent from which she receives impulse. After having made himself double, he makes nature in like manner twofold, and then he supposes she is vivified by an intelligence, which he borrows from himself, Placed in an impossibility of becoming acquainted with this agent, as well as with that which he has gratuitously distinguished from his own body; he has invented the word spiritual to cover up his ignorance; which is only in other words avowing it is a substance entirely unknown to him. From that moment, however, he has no ideas whatever of what he himself has done; because he first clothes it with all the qualities he esteems in his fellows, and then destroys them by an assurance, that they in no wise resemble the qualities he has been so anxious to bestow. To remedy this inconvenience, he concludes this spiritual substance much more noble than matter; that its prodigious subtilty, which he calls simplicity, but which is only the effect of metaphysical abstraction, secures it from decomposition, from dissolution, from all those revolutions, to which material bodies, as produced by nature, are evidently exposed.