Without a very marked derangement of our organs, our sentiments hardly ever vary upon those objects which either our senses experience, or which reason has clearly demonstrated, In whatever circumstances we are found, we have no doubt either upon the whiteness of snow, the light of day, or the utility of virtue. It is not so with those objects which depend solely upon our imagination--which are not proved to us by the constant evidence of our senses; we judge of them variously, according to the dispositions in which we find ourselves. These dispositions fluctuate by reason of the involuntary impulse which our organs every instant receive, on the part of an infinity of causes, either exterior to ourselves, or else contained within our own frame. These organs are, without our knowledge, perpetually modified, either relaxed or braced by the density, more or less, of the atmosphere; by heat and by cold; by dryness and by humidity; by health and by sickness; by the heat of the blood; by the abundance of bile; by the state of the nervous system, &c. These various causes have necessarily an influence upon the momentary ideas, upon the instantaneous thoughts, upon the fleeting opinions of man, He is, consequently, obliged to see under a great variety of hues, those objects which his imagination presents to him; without it all times having the capacity to correct them by experience: to compare them by memory. This, without doubt, is the reason why man is continually obliged to view his gods, to contemplate his superstitious systems, under such a diversity of aspects, in different periods of his existence. In the moment, when his fibres find themselves disposed to he tremulous, he will be cowardly, pusillanimous; he will think of these systems only with fear and trembling. In the moment, when these same fibres shall have more tension, he will possess more firmness, he will then view these systems with greater coolness. The theologian will call his pusillanimity, "inward feeling;" "warning from heaven;" "secret inspiration;" but he who knoweth man, will say that this is nothing more than a mechanical motion, produced by a physical or natural cause. Indeed, it is by a pure physical mechanism, that we can explain all the revolutions that take place in the system, frequently from one minute to another; all the fluctuations in the opinions of mankind; all the variations of his judgment: in consequence of which we sometimes see him reasoning justly, sometimes in the most irrational manner.