Still humanly speaking, I answer these gentlemen that they are very knowing. They tell us, first, that there is a soul, and then what that soul must be. They pronounce the word "matter," and then plainly decide what it is. And I say to them: You have no knowledge either of spirit or of matter. By spirit you can imagine only the faculty of thinking; by matter you can understand only a certain assemblage of qualities, colors, extents, and solidities, which it has pleased you to call matter; and you have assigned limits to matter and to the soul, even before you are sure of the existence of either the one or the other. As for matter, you gravely teach that it has only extent and solidity; and I tell you modestly, that it is capable of a thousand properties about which neither you nor I know anything. You say that the soul is indivisible, eternal; and here you assume that which is in question. You are much like the regent of a college, who, having never in his life seen a clock, should all at once have an English repeater put into his hands. This man, a good peripatetic, is struck by the exactness with which the hands mark the time, and still more astonished that a button, pressed by the finger, should sound precisely the hour marked by the hand. My philosopher will not fail to prove that there is in this machine a soul which governs it and directs its springs. He learnedly demonstrates his opinion by the simile of the angels who keep the celestial spheres in motion; and in the class he forms fine theses, maintained on the souls of watches. One of his scholars opens the watch, and nothing is found but springs; yet the system of the soul of watches is still maintained, and is considered as demonstrated. I am that scholar, opening the watch called man; but instead of boldly defining what we do not understand, I endeavor to examine by degrees what we wish to know. Let us take an infant at the moment of its birth, and follow, step by step, the progress of its understanding. You do me the honor of informing me that God took the trouble of creating a soul, to go and take up its abode in this body when about six weeks old; that this soul, on its arrival, is provided with metaphysical ideas--having consequently a very clear knowledge of spirit, of abstract ideas, of infinity--being, in short, a very knowing person. But unfortunately it quits the uterus in the uttermost ignorance: for eighteen months it knows nothing but its nurse's teat; and when at the age of twenty years an attempt is made to bring back to this soul's recollection all the scientific ideas which it had when it entered its body, it is often too dull of apprehension to conceive any one of them. There are whole nations which have never had so much as one of these ideas. What, in truth, were the souls of Descartes and Malebranche thinking of, when they imagined such reveries? Let us then follow the idea of the child, without stopping at the imaginings of the philosophers.