Pascal, who was driven by delirium into exaggerated humility, who said that Christianity suppressed the Ego, has not written his autobiography; yet he, too, showed traces of his hallucinations in the celebrated Amulet, and, in his Pensées, subtly described himself when speaking of others. It is certain that he was alluding to himself when he wrote that “extreme genius is close to extreme folly, and men are so mad that he who should not be so would be a madman of a new kind;” and when he observed that “maladies influence our judgment and sense; and while great ones perceptibly alter them, even slight ones cannot but influence them in proportion;” and that “men of genius have their heads higher, but their feet lower than the rest of us; they are all on the same level, and stand on the same clay as ourselves, children, and brutes.”

Haller, in his diary, gives detailed notes of his own religious delusions, and often confesses to having completely changed his character in the course of twenty-four hours, and being “giddy, mad, persecuted by God, and scorned and despised by men.”

Lessmann who, at a later time, hanged himself, wrote the humorous Diary of a Melancholiac (1834). Tasso, in his letter to the Duke of Urbino, and in the stanza already quoted, clearly depicted his own insanity. “Francesco,” he says elsewhere, “O Francesco, within my infirm limbs I have an infirm soul.”[445] It is a curious fact that, shortly before his first attack of mania, he wrote these words, “As I do not deny that I am mad, I must believe that my madness has been caused by drunkenness or love, since I know well that I drink to excess,” &c.[446]

Dostoïeffsky continually introduces semi-insane characters, and especially epileptics, in Besi and The Idiot, and moral lunatics in Crime and Punishment.

Gérard de Nerval was the author of Aurelia, which has been well called the “Song of Songs of Fever,” and is a mixture of poetry and gibberish. Barbara wrote Les Détraqués. Buston described his own hallucinations. Allix, though not a medical man, wrote on the treatment of the insane. Lenau, twelve years before he actually succumbed to the attacks of insanity, had foreseen and described it. All his poems depict, in colours painfully vivid, suicidal and melancholic tendencies. The reader may judge of this from the mere titles of some of his lyrics, “To a Hypochrondriac,” “The Madman,” “The Diseased in Soul,” “The Violence of a Dream,” “The Moon of Melancholy.”

I do not think that it is possible to find, in the most doleful pages of J. Ortis so accurate and vividly coloured a description of suicidal tendencies as in the following extract from the Seelenkranke, “I carry a deep wound in my heart, and will carry it in silence to the grave; my life is broken from hour to hour. One alone could comfort me, ... but she lies in the grave.... O my mother! let thyself be moved by my entreaties, if thy love still survives death, if it is still permitted thee to care for thy child.... Oh! let me soon escape from life! I long for the night of death! Oh! only help thy crazy son to lay aside his grief.” His Traumgewalten is, as I have already observed, a terribly truthful picture of that hallucination which preceded or accompanied the first attack of suicidal mania; and here the reader can easily trace in the phrases and ideas that disconnected and fragmentary character which is the mark of the delirious paralytic.

Here is a specimen—“The dream was so terrible, so wild, so frightful, that I wish I could tell myself it was nothing but a dream; ... yet I continue to weep, and to feel that my heart beats; I awaken, and find the sheets and the pillow wet.... Did I seize them in my dream and wipe my face? I do not know.... While I was sleeping, my hostile guests have been holding an orgy here.... Now they are gone, those savages, they are gone, but I find their traces in my tears. They have fled, and left the wine on the table,” &c.

He had previously, in the Albigenses, dropped some allusions to the terrible impression made on him by his dreams: “Terrible, often, is the might of dreams; it shakes, pains, presses, threatens, and if the sleeper does not awaken in time, in the twinkling of an eye, he is a corpse.”[447]

XII. The principal trace of the delusions of great minds is found in the very construction of their works and speeches, in their illogical deductions, absurd contradictions, and grotesque and inhuman fantasies. Thus Socrates was clearly of unsound mind when, after having all but arrived, intuitively, at Christian morality and Judaic monotheism, he directed his steps in accordance with a sneeze, or the voice and signs of his imaginary genius. Thus Cardan, who had anticipated Newton in discovering the laws of gravitation, and Dupuis in theology—who, in his book De Subtilitate, explains as hallucinations the strange and portentous symptoms of the possessed, and also of some of those hermits who were accounted saints, comparing them to the delirium of quartan fever—Cardan was insane, when he attributed to the influence of a genius, not only his scientific inspirations, but the creaking of the table and the vibration of the pen, when he declared that he had been several times bewitched, and when he produced his book On Dreams, which speaks to the mental pathologist as a pseudo-membrane would to the physical. In this, at first, he puts on record the most accurate and curious observations on the phenomena of dreams—e.g., how severe physical pains act with less energy, slight ones with greater—a fact recently confirmed by psychiatrists; that the insane are much given to dreaming; that in a dream, as on the stage, a long series of ideas passes in a very short space of time; and finally (and this is a remark of much justice) that men have dreams either entirely analogous to, or entirely at variance with, their own habits. But, after these clear and undoubted proofs of genius, he re-affirms one of the most absurd and contemptible theories ever held by the populace of ancient times, namely, that the slightest accidental circumstance of a dream must be the revelation of a more or less distant future. Thus he draws up, with the sincerest conviction, a dictionary, identical in form and origin (which last is undoubtedly pathological) with Cabalistic productions. Every object, every word, which may find a place in a dream, is there attached to a series of allusions which serve to interpret each other. Father may signify author, husband, son, commander. Feet, foundation of a house, arts, workmen, &c. A horse, appearing in a dream, may signify flight, riches, or a wife. Shoemaker and physician are interchangeable in meaning. In short, it is not actual analogies which prevail, but analogies in words, in sounds, even in terminations. Orior and morior have an equal prophetic value, because “since they differ from each other only by a single letter, the one passes over to the other.” We are seized with compassion for human nature and for ourselves, when we find him relating that a knight who suffered from the stone always, if he dreamed of food, had an attack on the following day, and adding cibos enim et dolores degustare dicimus—as though nature were in the habit of amusing herself by making puns in Latin. Yet this was the man who had intuitively divined the admirable theory of painful sensations in sleep already alluded to, and who, a physician, and one of no mean distinction, had clearly conceived the sympathetic action of the solar plexus.

Newton himself can scarcely be said to have been sane when he demeaned his intellect to the interpretation of the Apocalypse, or the horns of Daniel; nor, again, when he wrote to Bentley, “By means of the law of attraction, one can very well understand the elongated orbits of comets; but as to the nearly circular orbits of planets, I see no possibility of obtaining their lateral difference, and this can only be accomplished by God.” Yet in his Optics, Newton had inveighed against those who, after the manner of the Aristotelians admit occult properties in matter, thus arresting the researches of natural philosophers, without leading to any conclusion. In fact, a century later, the true cause, which had escaped Newton’s observations, was discovered by La Place.