whilst the matter, to which it is united, only moves? Therefore, here are two natures or substances very unlike and distinct. We know one by figures and local motions only; as we do the other by perceptions and reasonings. The one does not imply, or create the idea of the other, for their respective ideas have nothing in common. SECT. XLV. Of the Union of the Soul and Body, of which God alone can be the Author. But now, how comes it to pass that beings so unlike are so intimately united together in man? Whence comes it that certain motions of the body so suddenly and so infallibly raise certain thoughts in the soul? Whence comes it that the thoughts of the soul, so suddenly and so infallibly, occasion certain motions in the body? Whence proceeds so regular a society, for seventy or fourscore years, without any interruption? How comes it to pass that this union of two beings, and two operations, so very different, make up so exact a compound, that many are tempted to believe it to be a simple and indivisible whole? What hand had the skill to unite and tie together these two extremes and opposites? It is certain they did not unite themselves by mutual consent, for matter having of itself neither thought nor will, to make terms and conditions, it could not enter into an agreement with the mind. On the other hand, the mind does not remember that it ever made an agreement with matter; nor could it be subjected to such an agreement, if it had quite forgot it. If the mind had freely, and of its own accord, resolved to submit to the impressions of matter, it would not, however, subject itself to them but when it should remember such a resolution, which, besides, it might alter at pleasure. Nevertheless, it is certain that in spite of itself it is dependent on the body, and that it cannot free itself from its dependence, unless it destroy the organs of the body by a violent death. Besides, although the mind had voluntarily subjected itself to matter, it would not follow that matter were reciprocally subjected to the mind. The mind would indeed have certain thoughts when the body should have certain motions, but the body would not be determined to have, in its turn, certain motions, as soon as the mind should have certain thoughts. Now it is most certain that this dependence is reciprocal. Nothing is more absolute than the command of the mind over the body. The mind wills, and, instantly, all the members of the body are in motion, as if they were acted by the most powerful machines. On the other hand, nothing is more manifest than the power and influence of the body over the mind. The body is in motion, and, instantly the mind is forced to think either with pleasure or pain, upon certain objects. Now, what hand equally powerful over these two divers and distinct natures has been able to bring them both under the same yoke, and hold them captive in so exact and inviolable a society? Will any man say it was chance? If