Narcotics also, and, in our day, most of the anæsthetics can produce visions and hallucinations, but the result is in all such cases much less interesting than when they are produced spontaneously. Tobacco and opium, betel, hasheesh, and coca are the principal means employed; but Siberia has besides its narcotic mushrooms, Polynesia its ava, New Granada and the Himalaya the thorn-apple, Florida its emetic apalachine, and the northern regions of America and Europe have their ledum. The most effective among these narcotics seems to be the Indian hemp, since the visions it produces surpass even the marvelous effects of opium, as has been recently again most graphically described by Bayard Taylor. Laughing-gas, also, has frequently similar effects, and affords, besides, the precious privilege of freedom from the painful, often excruciating consequences of other narcotics. When perfumes are employed for the express purpose of producing visions, it is difficult to ascertain how much is due to their influence, and how much to the over-excited mind of the seer. Benvenuto Cellini describes—though probably not in the most trustworthy manner—the amazing effect produced upon himself and a boy by his side, by the perfumes which a priest burnt in the Coliseum. The whole vast building seemed to him filled with demons, and the boy saw thousands of threatening men, four huge giants, and fire bursting out in countless places. The great artist was told, at the same time, that a great danger was threatening him, and that he would surely lose his beloved Angelica within the month; both events occurred as predicted, and thus proved that in this case at least magic phenomena had accompanied the visions. (Goethe, B. Cellini, l. iv. ch. 2.)
Among other external causes which are apt to produce visions, must be mentioned violent motions, especially when they are revolving, as is the case with the Shamans of the Laplanders and the dancing Dervishes of the East; self-inflicted wounds, such as the priests of Baal caused in order to excite their power of divination, and long-continued imprisonment, as illustrated in the well-known cases of Benvenuto Cellini and Silvio Pellico. The latter was constantly tormented by sighs or suppressed laughter which he heard in his dungeon; then by invisible hands pulling at his dress, knocking down his books or trying to put out his light, till he began seriously to suspect that he might be the victim of invisible malignant powers. Fortunately all these phenomena disappeared at break of day, and thus his vigorous mind, supported by true piety, was enabled to keep his judgment uninjured.
Diseases of every kind are a fruitful source of visions and some are rarely without them; but the character of visions differs according to the nature of the affections. Persons who suffer with the liver have melancholy, consumptive patients have cheerful visions. Epileptics often see fearful spectres during their paroxysms, and persons bitten by mad dogs see the animal that has caused their sufferings. The case of the bookseller Nicolai in Berlin is well known; the disease of which he suffered, is not only very common in some parts of Russia, but productive of precisely the same symptoms. The patients experience first a sensation of great despondency, followed by a period of profound melancholy, during which they see themselves surrounded by a number of persons, with whom they converse and quarrel, half conscious of their own delusion and yet not able to master it wholly. They are generally bled, whereupon the images become transparent and shrink into smaller and smaller space, till they finally disappear entirely. Affections of the heart and the subsequent unequal distribution of the blood through the system are apt to produce peculiar sounds, which at times fashion themselves into loud and harmonious pieces. The excitement usually attendant upon specially fatal plagues and contagious diseases increases the tendency which the latter naturally have to cause hallucinations. During a plague in the reign of Justinian, men were seen walking through the crowd and touching here and there a person; the latter were at once attacked by the disease and invariably succumbed. Upon another such occasion marks and spots appeared on the clothing of those who had caught the contagion, as if made by invisible hands, the sufferers began next to see a number of spectres and died in a short time. The same symptoms have accompanied the cholera in modern times, and more than once strange, utterly unknown persons were not only seen but heard, as they were conversing with others; what they said was written down in many cases, and proved to be predictions of approaching visits of the dread disease to neighboring houses. A magic power of foresight seems in these cases to be developed by the extreme excitement or deep anxiety, but the unconscious clairvoyance assumes the form of persons outside of their own mental sphere, within which they alone existed.
By far the most frequent causes of visions are, however, those of psychical nature, like fixed ideas, intense passions, or deep-rooted prejudices, and concealed misdeeds. When they are produced by such causes they have often the appearance of having led to the commission of great crimes. Thus Julian the Apostate, who had caused the image of his guardian angel to be put upon all his coins and banners, naturally had this form deeply impressed upon his mind. In the night before a decisive battle, he saw, according to Ammianus Marcellinus, this protecting genius in the act of turning away from him, and this vision made so deep an impression upon his mind that he interpreted it as an omen of his impending death. On the following day he fell in battle. The fearful penalty inflicted upon Charles IX. by his own conscience is well known; after the massacre of St. Bartholomew he saw, by day and by night, the forms of his victims around him, till death made an end to his sufferings. On our own continent, one of the early conquerors gave a striking instance of the manner in which such visions are produced. He was one of the adventurers who had reached Darien, and was on the point of plundering a temple; but, a few days before, an Indian woman had told him that the treasures it held were guarded by evil spirits, and if he entered it the earth would open and swallow up the temple and the conquerors alike. Nothing daunted, he led his men to the attack; but, as they came in sight, he suddenly saw, in the evening light, how the colossal building rocked to and fro as in a tempest, and thoroughly intimidated he rode away with his followers, leaving the temple and its treasures unharmed. That visions are apt to precede atrocious crimes is quite natural, since they are in such cases nothing but the product of the intense excitement under which murders are often committed; but, it would be absurd to look upon them as motive causes. Ravaillac had constant visions of angels, saints, and demons, while preparing his mind for the assassination of Henry IV., and the young student who attempted the murder of Napoleon at Schönbrunn repeatedly saw the genius of Germany, which appeared to him and encouraged him to free his country from the usurper. Persons who attempt to summon ghosts are very apt to see them, because their mind is highly wrought up by their proceedings and they confidently expect to have visions. But some men possess a similar power without making any special effort or peculiar preparations, their firm volition sufficing for the purpose. Thus Talma could at all times force himself to see, in the place of the actual audience before whom he was acting, an assembly of skeletons, and he is said never to have acted better than when he gave himself up to this hallucination. Painters, also, frequently have the power to summon before their mind's eye the features of those whose portrait they are painting; Blake, for instance, was able actually to finish likenesses from images he saw sitting in the chair where the real persons had been seated.
While visions are quite common, delusions of the other senses are less frequent. The insane alone hear strange conversations. Hallucinations of the taste cause patients to enjoy delightful dishes, or to partake of spoiled meat and other unpalatable viands, which have no existence. Sweet smells and incense are often perceived, bad odors much less frequently. The touch is of all senses the least likely to be deceived; still deranged people occasionally feel a slight touch as a severe blow, and persons suffering from certain diseases are convinced that ants, spiders, or other insects are running over their bodies.
The favorite season of visions is night—mainly the hour about midnight—and in the whole year, the time of Advent, but also the nights from Christmas to New Year. This is, of course, not a feature of supernatural life, but the simple effect of the greater quiet and the more thoughtful, inward life, which these seasons are apt to bring to busy men. The reality of our surroundings disappears with the setting sun, and in deep night we are rendered almost wholly independent of the influence exercised in the day by friends, family, and even furniture. All standards of measurement, moreover, disappear, and we lose the correct estimate of both space and time. Turning our thoughts at such times with greater energy and perseverance inward, our imagination has free scope, and countless images appear before our mind's eye which are not subject to the laws of real life. Darkness, stillness, and solitude, the three great features of midnight seasons, all favor the full activity of our fancy, and set criticism at defiance by denying us all means of comparison with real sounds or sights. At the same time, it is asserted, that under such circumstances men are also better qualified to perceive manifestations which, during the turba of daily life, are carelessly ignored or really imperceptible to the common senses. So long as the intercourse with the world and its exigencies occupy all our thoughts, and self-interest makes us look fixedly only at some one great purpose of life, we are deaf and blind to all that does not clearly belong to this world. But when these demands are no longer made upon us, and especially when, as in the time of Advent, our thoughts are somewhat drawn from earthly natures, and our eyes are lifted heavenward, then we are enabled to give free scope to our instincts, or, if we prefer the real name, to the additional sense by which we perceive intangible things. A comparison has often been drawn between the ability to see visions and our power to distinguish the stars. In the day, the brilliancy of the sun so far outshines the latter, that we see not a single one; at night they step forth, as it were, from the dark, and the deeper the blackness of the sky, the greater their own brightness. Are they, on that account, nothing more than creatures of our imagination, set free by night and darkness?
As for the favorite places where visions most frequently are seen, it seems that solitudes have already in ancient times always been looked upon as special resorts for evil spirits. The deserts of Asia, with their deep gullies and numerous caves, suggested a population of shy and weird beings, whom few saw and no one knew fully. Hence the fearful description of Babylon in her overthrow, when "Their houses shall be full of doleful creatures, and owls shall dwell there and satyrs shall dance there." (Isaiah xiii. 21). The New Testament speaks in like manner of the deserts of Palestine as the abode of evil spirits, and in later days the Faroe Islands were constantly referred to as peopled with weird and unearthly beings. The deserts of Africa are full of Djinns, and the vast plains of the East are peopled with weird apparitions. The solitudes of Norwegian mountain districts abound with gnomes and sprites, and waste places everywhere are no sooner abandoned by men than they are occupied by evil spirits and become the scenes of wild and gruesome visions.
Well-authenticated cases of visions are recorded in unbroken succession from the times of antiquity to our own day, and leave no doubt on the mind that they are not only of common occurrence among men, but generally, also, accompanied by magic phenomena of great importance. The ancients saw, of course, most frequently their gods; the pagans, who had been converted to Christianity, their former idols threatening them with dire punishment; and Christians, their saints and martyrs, their angels and demons. Thus all parties are supported by authorities in no way peculiar to one faith or another, but common to all humanity; and the battle is fought, for a time at least, between faith and faith, and between vision and vision. A famous rhetor, Aristides, who is mentioned in history as one of the mightiest champions polytheism ever has been able to raise against triumphant Christianity, saw, in his hours of exaltation, the great Æsculapius, who gave him directions how to carry on his warfare. At such times his public addresses became so attractive that thousands of enthusiastic hearers assembled to hang upon his lips. The story of the genius of Socrates is well known; Aulus Gellius tells us how the great sage was seen standing motionless for twenty-four hours in the same place, before joining the expedition to Potidea, so absorbed in deep thought that it seemed as if his soul had left the body. Dion, Plato's most intimate friend, saw a huge Fury enter his house and sweep it with a broom; a conspiracy broke out, and he was murdered, after having lost his only son a few days before. (Plutarch's "Life of Dion," 55.) The same Simonides, who according to Valerius Maximus (De Somniis, l. i. ch. 5), had escaped from shipwreck by the timely warning of a spirit, was once dining at the magnificent house of Skopas at Cranon, in Thessaly, when a servant entered to inform him that two gigantic youths were standing at the door and wished to see him immediately. He went out and found no one there; but, at the same moment, the roof and the walls of the dining-room fell down, burying all the guests under the ruins (Phædrus' Fab., iv. 24). The ancients looked upon the vision, in both cases, as merely effects of the prophetic power of the poet, which saved him from immediate death; once in the form of a spirit and the second time in the form of the Dioscuri. For, as Simonides had shortly before written a beautiful poem in honor of Castor and Pollux, his escape and the friendly warning were naturally attributed to the heroic youths, who constantly appear in history as protective genii. In Greece they were known to have fought, dressed in their purple cloaks and seated on snow-white horses, on the side of the Locri, and to have announced their victory on the same day in Olympia, and Sparta, in Corinth, and in Athens (Justin, ix. 3). In Rome they were credited with the victory on the banks of Lake Regillus, and reported to have, as in Greece, dashed into the city, far ahead of all messengers, to proclaim the joyful news. During the Macedonian war they met Publius Vatinius on his way to Rome and informed him that, on the preceding day, Æmilius Paulus had captured Perseus. Delighted with the news, the prefect hastens to the Senate; but is discredited and actually sent to jail on the charge of indulging in idle gossip, unworthy of his high office. It was only when at last messengers came from the distant army and confirmed the report of Perseus' captivity, that the unlucky prefect was set free again and honored with high rewards.
In other cases the warning genius was seen in visions of different nature. Thus Hannibal was reported to have traced in his sleep the whole course and the success of all his plans, by the aid of his genius, who appeared to him in the shape of a child of marvelous beauty, sent by the great Jupiter himself to direct his movements, and to make him master of Italy. The child asked him to follow without turning to look back, but Hannibal, yielding to the innate tendency to covet forbidden fruit, looked behind him and saw an immense serpent overthrowing all impediments in his way. Then came a violent thunderstorm with fierce lightnings, which rent the strongest walls. Hannibal asked the meaning of these portents, and was told that the storm signified the total subjection of Italy, but that he must be silent and leave the rest to fate. That the vision was not fully realized, was naturally ascribed to his indiscretion. The genius of the two Consuls, P. Decius and Manlius Torquatus, assumed, on the contrary, the shape of a huge phantom which appeared at night in their camp at the foot of Vesuvius, and announced the decision that one leader must fall in order to make the army victorious. Upon the strength of this vision the two generals decided that he whose troops should first show signs of yielding, should seek death by advancing alone against the Latin army. The legions of Decius, therefore, no sooner began to fall back, than he threw himself, sword in hand, upon the enemy, and not only died a glorious death for his country, but secured a brilliant victory to his brethren.
At a later period a genius saved the life of Octavian, when he and Antony were encamped at Philippi, on the eve of the great battle against Brutus and Cassius. The vision appeared not to himself, however, but to another person, his own physician, Artorus, who, in a dream, was ordered to advise his master to appear on the battle-field in spite of his serious indisposition. Octavian followed the advice and went out, though he had to be carried by his men in a litter; during his absence the soldiers of Brutus entered the camp and actually searched his tent, in which he would have perished inevitably without the timely warning. Of a very different nature was the vision of Cassius, the lieutenant of Antony, who, during his flight to Athens, saw at night a huge black phantom, which informed him that he was his evil spirit. In his terror he called his servants and inquired what they had seen, but they had noticed nothing. Thus tranquilized, he fell asleep again, but the phantom returned once more, and disturbed his mind so painfully that he remained awake the rest of the night, surrounded by his guards and slaves. The vision was afterwards interpreted as an omen of his impending violent death.