In order to combat the apparitions of angels, demons, and disembodied souls, we still bring forward the effects of a prepossessed fancy, struck with an idea, and of a weak and timid mind, which imagine they see and hear what subsists only in idea; we advert to the inventions of the malignant spirits, who like to make sport of and to delude us; we call to our assistance the artifices of the charlatans, who do so many things which pass for supernatural in the eyes of the ignorant. Philosophers, by means of certain glasses, and what are called magic lanterns, by optical secrets, sympathetic powders, by their phosphorus, and lately by means of the electrical machine, show us an infinite number of things which the simpletons take for magic, because they know not how they are produced. Eyes that are diseased do not see things as others see them, or else behold them differently. A drunken man will see objects double; to one who has the jaundice, they will appear yellow; in the obscurity, people fancy they see a spectre, when they see only the trunk of a tree. A mountebank will appear to eat a sword; another will vomit coals or pebbles; one will drink wine and send it out again at his forehead; another will cut off his companion's head, and put it on again. You will think you see a chicken dragging a beam. The mountebank will swallow fire and vomit it forth, he will draw blood from fruit, he will send from his mouth strings of iron nails, he will put a sword on his stomach and press it strongly, and instead of running into him, it will bend back to the hilt; another will run a sword through his body without wounding himself; you will sometimes see a child without a head, then a head without a child, and all of them alive. That appears very wonderful; nevertheless, if it were known how all those things are done, people would only laugh, and be surprised that they could wonder at and admire such things. What has not been said for and against the divining-rod of Jacques Aimar? Scripture proves to us the antiquity of divination by the divining-rod, in the instance of Nebuchadnezzar,[432] and in what is said of the prophet Hosea.[433] Fable speaks of the wonders wrought by the golden rod of Mercury. The Gauls and Germans also used the rod for divination; and there is reason to believe that often God permitted that the rods should make known by their movements what was to happen; for that reason they were consulted. Every body knows the secret of Circe's wand, which changed men into beasts. I do not compare it with the rod of Moses, by means of which God worked so many miracles in Egypt; but we may compare it with those of the magicians of Pharaoh, which produced so many marvelous effects.