Formerly, these ghosts were believed to be almost innumerable. Earth, air, and water were filled with these phantom hosts. In modern times they have greatly decreased in number, because the second theory,--a mingling of the supernatural and natural,--has generally been adopted. The remaining ghosts, however, are supposed to per-form the same offices as the hosts of yore. It has always been believed that these ghosts could in some way be appeased; that they could be flattered by sacrifices, by prayer, by fasting, by the building of temples and cathedrals, by the blood of men and beasts, by forms and ceremonies, by chants, by kneelings and prostrations, by flagellations and maimings, by renouncing the joys of home, by living alone in the wide desert, by the practice of celibacy, by inventing instruments of torture, by destroying men, women and children, by covering the earth with dungeons, by burning unbelievers, by putting chains upon the thoughts and manacles upon the limbs of men, by believing things without evidence and against evidence, by disbelieving and denying demonstration, by despising facts, by hating reason, by denouncing liberty, by maligning heretics, by slandering the dead, by subscribing to senseless and cruel creeds, by discouraging investigation, by worshiping a book, by the cultivation of credulity, by observing certain times and days, by counting beads, by gazing at crosses, by hiring others to repeat verses and prayers, by burning candles and ringing bells, by enslaving each other and putting out the eyes of the soul. All this has been done to appease and flatter these monsters of the air. In the history of our poor world, no horror has been omitted, no infamy has been left undone by the believers in ghosts,--by the worshipers of these fleshless phantoms. And yet these shadows were born of cowardice and malignity. They were painted by the pencil of fear upon the canvas of ignorance by that artist called superstition. From, these ghosts, our fathers received information. They were the schoolmasters of our ancestors. They were the scientists and philosophers, the geologists, legislators, astronomers, physicians, metaphysicians and historians of the past. For ages these ghosts were supposed to be the only source of real knowledge. They inspired men to write books, and the books were considered sacred. If facts were found to be inconsistent with these books, so much the worse for the facts, and especially for their discoverers. It was then, and still is, believed that these books are the basis of the idea of immortality; that to give up these volumes, or rather the idea that they are inspired, is to renounce the idea of immortality. This I deny.