Any one who has had the rare fortune to live with men of genius is soon struck by the facility with which they misinterpret the acts of others, believe themselves persecuted, and find everywhere profound and infinite reasons for grief and melancholy. Their intellectual superiority contributes to this end, being equally adapted to discover new aspects of truth and to create imaginary ones, confirming their own painful illusions. It is true, also, that their intellectual superiority permits them to acquire and to express, regarding the nature of things, convictions different from those adopted by the majority, and to manifest them with an unshakeable firmness which increases the opposition and contrast.
But the principal cause of their melancholy and their misfortunes is the law of dynamism which rules in the nervous system. To an excessive expenditure and development of nervous force succeeds reaction or enfeeblement. It is permitted to no one to expend more than a certain quantity of force without being severely punished on the other side; that is why men of genius are so unequal in their productions. Melancholy, depression, timidity, egoism, are the prices of the sublime gifts of intellect, just as uterine catarrhs, impotence, and tabes dorsalis are the prices of sexual abuse, and gastritis of abuse of appetite.
Milli, after one of her eloquent improvisations which are worth the whole existence of a minor poet, falls into a state of paralysis which lasts several days. Mahomet after prophesying fell into a state of imbecility. “Three suras of the Koran,” he said one day to Abou-Bekr, “have been enough to whiten my hair.”74 In short, I do not believe there has ever been a great man who, even at the height of his happiness, has not believed and proclaimed, even without cause, that he was unfortunate and persecuted, and who has not at some moment experienced the painful modifications of sensibility which are the foundation of melancholia.
Sometimes this sensibility undergoes perversion; it consumes itself, and is agitated around a single point, remaining indifferent to all others. Certain series of ideas or sensations acquire, little by little, the force of a special stimulant on the brain, and sometimes on the entire organism, so that they seem to survive life itself. Heine, who in his letters declared himself incapable of understanding the simplest things, Heine, blind and paralytic, when advised to turn towards God, replied in his dying agony: “Dieu me pardonnera; c’est son métier;” thus crowning with a stroke of supreme irony the most æsthetically cynical life of our time. The last words of Aretino after extreme unction were, it is said, “Keep me from the rats now I am anointed.” The dying Rabelais enveloped his head in his domino, and said, “Beati qui in Domino moriuntur.” Malherbe, in his last illness, reproached his nurse with the solecisms she committed, and rejected the counsel of his confessor on account of its bad style. The last words of Bouhours the grammarian, were, “Je vais ou je va mourir: l’un et l’autre se disent.”
Foscolo confesses that “very active in some directions, he was in others inferior to a man, to a woman, to a child.”75 It is known that Corneille, Descartes, Virgil, Addison, La Fontaine, Dryden, Manzoni, Newton, were almost incapable of expressing themselves in public. D’Alembert and Ménage, insensible to the sufferings of a surgical operation, wept at a slight critical censure. Luce de Lancival smiled when his legs were amputated, but could not endure Geoffrey’s criticisms. Linnæus, at the age of sixty, rendered paralytic and insensible by an apoplectic stroke, was aroused when carried near to his beloved herbarium.76 Lagny was stretched out comatose, insensible to the strongest stimulants, when it occurred to some one to ask him the square of twelve, he replied immediately, “One hundred and forty-four.” Sebouyah, the Arab grammarian, died of grief because the Khalif Haroun-al-Raschid did not agree with him on some grammatical point.
It should be observed here that men of genius, at all events, if men of science, often present that species of mania which Wechniakoff77 and Letourneau78 have called monotypic. Such men occupy themselves throughout their whole lives with one single problem, the first which takes possession of their brains, and which henceforth rules them. Otto Beckmann was occupied during the whole of his life with the pathology of the kidneys; Fresnel with light; Meyer with ants. Here is a new and striking point of resemblance with monomaniacs.
On account of this exaggerated and concentrated sensibility, it becomes very difficult to persuade or dissuade either men of genius or the insane. In them the roots of error, as well as those of truth, fix themselves more deeply and multiplexly than in other men, for whom opinion is a habit, an affair of fashion, or of circumstance. Hence the slight utility of moral treatment as applied to the insane; hence also the frequent fallibility of genius.
In the same way we can explain why it is that great minds do not seize ideas that the most vulgar intelligence can grasp, while at the same time they discover ideas which would have seemed absurd to others: their greater sensibility is associated with a greater originality of conception. In exalted meditation thought deserts the more simple and easy paths which no longer suit its robust energy. Thus Monge resolved the most difficult problems of a differential calculus, and was embarrassed in seeking an algebraic root of the second degree which a schoolboy might have found. One of Lulli’s friends used to say habitually on his behalf: “Pay no attention to him; he has no common sense: he is all genius.”
Paræsthesia.– To the exhaustion and excessive concentration of sensibility must be attributed all those strange acts showing apparent or intermittent anæsthesia, and analgesia, which are to be found among men of genius as well as among the insane. Socrates presented a photo-paræsthesia which enabled him to gaze at the sun for a considerable time without experiencing any discomfort. The Goncourts, Flaubert, Darwin had a kind of musical daltonism.
Amnesia.– Forgetfulness is another of the characters of genius. It is said that Newton once rammed his niece’s finger into his pipe; when he left his room to seek for anything he usually returned without bringing it.79 Rouelle generally explained his ideas at great length, and when he had finished, he added: “But this is one of my arcana which I tell to no one.” Sometimes one of his pupils rose and repeated in his ear what he had just said aloud; then Rouelle believed that the pupil had discovered the arcanum by his own sagacity, and begged him not to divulge what he had himself just told to two hundred persons. One day, when performing an experiment during a lecture, he said to his hearers: “You see, gentlemen, this cauldron over the flame? Well, if I were to leave off stirring it an explosion would at once occur which would make us all jump.” While saying these words, he did not fail to forget to stir, and the prediction was accomplished; the explosion took place with a fearful noise: the laboratory windows were all smashed, and the audience fled to the garden.80 Sir Everard Home relates that he once suddenly lost his memory for half an hour, and was unable to recognise the house and the street in which he lived; he could not recall the name of the street, and seemed to hear it for the first time. It is told of Ampère that when travelling on horseback in the country he became absorbed in a problem; then, dismounting, began to lead his horse, and finally lost it; but he did not discover his misadventure until, on arrival, it attracted the attention of his friends. Babinet hired a country house, and after making the payments returned to town; then he found that he had entirely forgotten both the name of the place and from what station he had started.81
One day Buffon, lost in thought, ascended a tower and slid down by the ropes, unconscious of what he was doing, like a somnambulist. Mozart, in carving meat, so often cut his fingers, accustomed only to the piano, that he had to