As for the particular offices and operations of those various tribes, 'Plato, in Critias, and after him his followers, gave out that they were men's governors and keepers, our lords and masters, as we are of our cattle. They govern provinces and kingdoms by oracles, auguries, dreams, rewards and punishments, prophecies, inspirations, sacrifices and religious superstitions, varied in as many forms as there be diversity of spirits; they send wars, plagues, peace, sickness, health, dearth, plenty, as appears by those histories of Thucydides, Livius, Dionysius Halicarnassensis, with many others, that are full of their wonderful stratagems.' They formerly devoted themselves, each one, to the service of particular individuals as familiar demons, 'private spirits.' Numa, Socrates, and many others were indebted to their Genius. The power of the devil is not limited to the body. 'Many think he can work upon the body, but not upon the mind. But experience pronounceth otherwise, that he can work both upon body and mind. Tertullian is of this opinion.'
The causes and inducements of 'possession' are many. One writer affirms that 'the devil being a slender, incomprehensible spirit can easily insinuate and wind himself into human bodies, and cunningly couched in our bowels, vitiate our healths, terrify our souls with fearful dreams, and shake our minds with furies. They go in and out of our bodies as bees do in a hive, and so provoke and tempt us as they perceive our temperature inclined of itself and most apt to be deluded.... Agrippa and Lavater are persuaded that this humour [the melancholy] invites the devil into it, wheresoever it is in extremity, and, of all other, melancholy persons are most subject to diabolical temptations and illusions, and most apt to entertain them, and the devil best able to work upon them. 'But whether,' declares Burton, 'by obsession, or possession, or otherwise, I will not determine; 'tis a difficult question.'[79]
[79] The Anatomy of Melancholy, by Democritus junior; edited by Democritus minor. Part i. sect. 2. An equally copious and curious display of learning. Few authors, probably, have been more plagiarised.
The mediævalists believed themselves surrounded everywhere by spiritual beings; but unlike the ancients, they were convinced not so much that they were the peculiar care of heaven as that they were the miserable victims of hellish malice, ever seeking their temporal as well as eternal destruction; a fact apparent in the whole mediæval literature and art.[80]
[80] Sismondi (Literature of the South of Europe) has observed of the greatest epic of the Middle Age, that 'Dante, in common with many fathers of the Church, under the supposition that paganism, in the persons of the infernal gods, represented the fallen angels, has made no scruple to adopt its fables.' Tasso, at a later period, introduces the deities of heathendom. In the Gerusalemme Liberata they sit in council to frustrate the plans and destroy the forces of the Christian leaders before Jerusalem (iv). Ismeno, a powerful magician in the ranks of the Turks, brings up a host of diabolic allies to guard the wood which supplied the infidels with materials for carrying on the siege of the city (xiii.). And the masterpieces of art of Guido or Raffaelle, which excite at once admiration and despair in their modern disciples, consecrated and immortalised the vulgar superstition.
Glanvil's conjectures on the cause of the comparative rarity of demoniac and other spiritual apparitions in general may interest the credulous or curious reader. ''Tis very probable,' reasons the Doctor, 'that the state wherein they are will not easily permit palpable intercourses between the bad genii and mankind: since 'tis like enough their own laws and government do not allow their frequent excursions into the world. Or it may with great probability be supposed that 'tis a very hard and painful thing for them to force their thin and tenuious bodies into a visible consistence, and such shapes as are necessary for their designs in their correspondence with witches. For in this action their bodies must needs be exceedingly compressed, which cannot well be without a painful sense. And this is, perhaps, a reason why there are so few apparitions, and why appearing spirits are commonly in such a hurry to be gone, viz. that they may be delivered of the unnatural pressure of their tender vehicles,[81] which I confess holds more in the apparition of good than evil spirits ... the reason of which probably is the greater subtlety and tenuity of the former, which will require far greater degrees of compression and consequently of pain to make them visible; whereas the latter are feculent and gross, and so nearer allied to palpable existences, and more easily reducible to appearance and visibility.'[82]
[81] So specious a theory must have occurred to, and its propriety will easily be recognised by, the spirit and ghost advocates of the present day.
[82] Sadducismus Triumphatus. Considerations about Witchcraft. Sect. xi.
'Palpable intercourses between the bad genii and mankind' are more frequent than Dr. Glanvil was disposed to believe; and he must have been conversant with the acts of Incubus and Succubus. In the first age (orbe novo cœloque recenti) under the Saturnian regime, 'while yet there was no fear of Jove,'[83] innocence prevailed undisturbed; but soon as the silver age was inaugurated by the usurpation of Jove, liaisons between gods and mortals became frequent. Love affairs between good or bad 'genii' and mankind are of common occurrence in the mythology of most peoples. In the romance-tales of the middle age lovers find themselves unexpectedly connected with some mysterious being of inhuman kind. The writers in defence of witchcraft quote Genesis vi. in proof of the reality of such intercourses; and Justin Martyr and Tertullian, the great apologists of Christianity, and others of the Fathers, interpret Filios Dei to be angels or evil spirits who, enamoured with the beauty of the women, begot the primeval giants.[84]
[83] 'Jove nondum Barbato.'