impression anteriorly received, by detaining it, or by causing an impression which it receives to remain, whilst it associates it with another, then with a third, gives all the mechanism of _reasoning_. An idea, which is only an imperceptible modification of the brain, gives play to the organ of speech, which displays itself by the motion it excites in the tongue: this, in its turn, breeds ideas, thoughts, and passions, in those beings who are provided with organs susceptible of receiving analagous motion; in consequence of which, the wills of a great number of men are influenced, who, combining their efforts, produce a revolution in a state, or even have an influence over the entire globe. It is thus, that an ALEXANDER decided the fate of Asia, it is thus, that a MAHOMET changed the face of the earth; it is thus, that imperceptible causes produce the most terrible, the most extended effects, by a series of necessary motion imprinted on the brain of man. The difficulty of comprehending the effects produced on the soul of man, has made him attribute to it those incomprehensible qualities which have been examined. By the aid of imagination, by the power of thought, this soul appears to quit his body, to carry itself with the greatest ease, to transport itself with the utmost facility towards the most distant objects; to run over, to approximate in the twinkling of an eye, all the points of the universe: he has therefore believed, that a being who is susceptible of such rapid motion, must be of a nature very distinguished from all others; he has persuaded himself that this soul in reality does travel, that it actually springs over the immense space necessary to meet these various objects; he did not perceive, that to do it in an instant, it had only to run over itself to approximate the ideas consigned to its keeping, by means of the senses.