The origin of almost all our knowledge may be traced to the earlier periods of antiquity. This is peculiarly the case with respect to the arts denominated magical. There were few ancient nations, however barbarous, which could not furnish many individuals to whose spells and enchantments the power of nature and the material world were supposed to be subjected. The Chaldeans, the Egyptians, and indeed all the oriental nations were accustomed to refer all natural effects, for which they could not account to the agency of demons, who were believed to preside over herbs, trees, rivers, mountains, and animals. Every member of the human body was under their power, and all corporeal diseases were produced by their malignity. For instance, if any happened to be affected with a fever, little anxiety was manifested to discover its cause, or to adopt rational measures for its cure; it must no doubt have been occasioned by some evil spirit residing in the body, or influencing, in some mysterious way, the fortunes of the sufferer. That influence could be counteracted only by certain magical rites; hence the observance of those rites soon obtained a permanent establishment in the East. Even at the present day, many uncivilized people hold that all nature is filled with genii, of which some exercise a beneficent, and others a destructive power. All evils with which man is afflicted, are considered the work of these imaginary beings, whose favour must he propitiated by sacrifices, incantations, and songs. If the Greenlander be unsuccessful in fishing, the Huron in hunting, or in war; if even the scarcely half reasoning Hottentot finds every thing is not right in his mind, body, or fortune, no time must be lost before the spirit be invoked. After the removal of some present evil, the next strongest desire in the human mind is the attainment of some future good. This good is often beyond the power, and still oftener beyond the inclination of man to bestow; it must therefore be sought from beings which are supposed to possess considerable influence over human affairs, and which being elevated above the baser passions of our nature, were thought to regard with peculiar favour all who acknowledged their power, or invoked their aid: hence the numerous rites which have, in all ages and countries, been observed in consulting superior intelligences, and the equally numerous modes in which their pleasure has been communicated to mortals.