The demonic theory of disease, including insanity, is universal among savages. For proof and illustration the reader has only to consult Dr. Tylor's splendid work on _Primitive Culture_. There are special demons for every malady, and the way to cure the disease is to cast out the evil spirit. Of course insanity is a striking disorder, and in default of the pathological explanation the savage regards the wild, wandering words and inexplicable actions of the sufferer as the words and actions of a demon, who has taken possession of the man's body, and driven his soul abroad or put it in abeyance. This theory of madness survived through all the centuries of Christian history until the advent of modern science. Mad people were chained up, exhibited as objects of derision, and often beaten unmercifully. It was the _devil_ in them, as in the poor witches, that was treated in this fashion. And it was a recognised part of a clergyman's business to cast out devils. The Church of England canon is still unrepealed which provides that the clergy, before engaging in this useful if not agreeable occupation, must obtain the written authority of their bishops. Laugh or smile as we will at this superstition, it is an integral part of the New Testament. The demonic theory of disease is confessed in the story of Jesus rebuking the fever of Peter's mother-in-law, so that it left her instantaneously, flying out of the door or window, or up the chimney. Jesus repeatedly cast out devils. He expelled seven, in succession or at one fell swoop, from Mary Magdalene. He turned a legion--that is, several thousands--out of the possessed Gadarenes; there being at least one apiece for the bedevilled swine who were driven to destruction. Paul likewise cast out devils. Indeed, if demonic possession in the New Testament is explained away, there is no reason why every other miraculous element should not be dealt with in the same manner. Mr. Gladstone perceives this, although he does not commit himself in his _Impregnable Rock of Holy Scripture_. "I am afraid," he says, in a letter to the Rev. J. W. Belcher, "that the objections to demoniacal possession involve in germ the rejection of all belief in the supernatural." This is wonderfully clear and straightforward for the Grand Old Man. Give up the belief that mad people may be tenanted by devils, and you should immediately join the National Secular Society. You have taken the first decisive step on the broad road of "infidelity," and nothing but a want of logic or courage prevents you from hastening to the inevitable conclusion.