C.--WHAT IS THE SOUL? WE KNOW NOTHING ABOUT IT. IF THIS PRETENDED SOUL WAS OF ANOTHER ESSENCE FROM THAT OF THE BODY, THEIR UNION WOULD BE IMPOSSIBLE. The superiority which men arrogate to themselves over other animals, is principally founded upon the opinion of possessing exclusively an immortal soul. But as soon as we ask what this soul is, they begin to stammer. It is an unknown substance; it is a secret force distinguished from their bodies; it is a spirit of which they can form no idea. Ask them how this spirit, which they suppose like their God, totally deprived of a physical substance, could combine itself with their material bodies? They will tell you that they know nothing about it; that it is a mystery to them; that this combination is the effect of the Almighty power. These are the clear ideas which men form of the hidden, or, rather, imaginary substance which they consider the motor of all their actions! If the soul is a substance essentially different from the body, and which can have no affinity with it, their union would be, not a mystery, but a thing impossible. Besides, this soul, being of an essence different from that of the body, ought to act necessarily in a different way from it. However, we see that the movements of the body are felt by this pretended soul, and that these two substances, so different in essence, always act in harmony. You will tell us that this harmony is a mystery; and I will tell you that I do not see my soul, that I know and feel but my body; that it is my body which feels, which reflects, which judges, which suffers, and which enjoys, and that all of its faculties are the necessary results of its own mechanism or of its organization. CI.--THE EXISTENCE OF A SOUL IS AN ABSURD SUPPOSITION, AND THE EXISTENCE OF AN IMMORTAL SOUL IS A STILL MORE ABSURD SUPPOSITION. Although it is impossible for men to have the least idea of the soul, or of this pretended spirit which animates them, they persuade themselves, however, that this unknown soul is exempt from death; everything proves to them that they feel, think, acquire ideas, enjoy or suffer, but by the means of the senses or of the material organs of the body. Even admitting the existence of this soul, one can not refuse to recognize that it depends wholly on the body, and suffers conjointly with it all the vicissitudes which it experiences itself; and however it is imagined that it has by its nature nothing analogous with it; it is pretended that it can act and feel without the assistance of this body; that deprived of this body and robbed of its senses, this soul will be able to live, to enjoy, to suffer, be sensitive of enjoyment or of rigorous torments. Upon such a tissue of conjectural absurdities the wonderful opinion of the immortality of the soul is built.