I have now arrived, by a devious path, at the conclusion of this letter, the object of which is to show from what attributes of our nature, whether mental or corporeal, arises that predisposition to believe in supernatural occurrences. It is, I think, conclusive that mankind, from a very early period, have their minds prepared for such events by the consciousness of the existence of a spiritual world, inferring in the general proposition the undeniable truth that each man, from the monarch to the beggar, who has once acted his part on the stage, continues to exist, and may again, even in a disembodied state, if such is the pleasure of Heaven, for aught that we know to the contrary, be permitted or ordained to mingle amongst those who yet remain in the body. The abstract possibility of apparitions must be admitted by every one who believes in a Deity, and His superintending omnipotence. But imagination is apt to intrude its explanations and inferences founded on inadequate evidence. Sometimes our violent and inordinate passions, originating in sorrow for our friends, remorse for our crimes, our eagerness of patriotism, or our deep sense of devotion--these or other violent excitements of a moral character, in the visions of night, or the rapt ecstasy of the day, persuade us that we witness, with our eyes and ears, an actual instance of that supernatural communication, the possibility of which cannot be denied. At other times the corporeal organs impose upon the mind, while the eye and the ear, diseased, deranged, or misled, convey false impressions to the patient. Very often both the mental delusion and the physical deception exist at the same time, and men's belief of the phenomena presented to them, however erroneously, by the senses, is the firmer and more readily granted, that the physical impression corresponded with the mental excitement. So many causes acting thus upon each other in various degrees, or sometimes separately, it must happen early in the infancy of every society that there should occur many apparently well-authenticated instances of supernatural intercourse, satisfactory enough to authenticate peculiar examples of the general proposition which is impressed upon us by belief of the immortality of the soul. These examples of undeniable apparitions (for they are apprehended to be incontrovertible), fall like the seed of the husbandman into fertile and prepared soil, and are usually followed by a plentiful crop of superstitious figments, which derive their sources from circumstances and enactments in sacred and profane history, hastily adopted, and perverted from their genuine reading. This shall be the subject of my next letter. LETTER II.