Monomania is sometimes simply the exaggerated regard to one side of many-sided truth. It is not absolute, but only relative delusion. It is in its degree true; but by affecting to be the whole truth, it becomes untrue. Philosophic reflection shews, that if a man fasten his attention on a single aspect of truth, and apply himself to that alone for a long time, 'the truth becomes distorted, and not itself, but falsehood;' and may be compared to the air, which is our natural element, and the breath of our nostrils; 'but if a stream of the same be directed on the body for a time, it causes cold, fever, and even death.' 'How wearisome,' exclaims Emerson, 'the grammarian, the phrenologist, the political or religious fanatic, or, indeed, any possessed mortal, whose balance is lost by the exaggeration of a single topic! It is incipient insanity.' The bore of society is constituted by his one-sidedness. His ear is deficient in the sense of harmony, and he deafens and disgusts you by harping on one string. The retired nabob holds you by the button, to hear his wearisome diatribes on Indian economics; the half-pay officer is too fluent on his worn-out recollections of the Peninsular War, and becomes savage if you broach a new theme, or move to adjourn the debate; the university pedant distracts you with his theories on philology and scansion—with his amended translation of a hexameter in Persius, and his new reading of a line in Theocritus; the bagman is all for 'the shop;' the policeman is redolent of the 'lock-up house 'and 'your wertchup;' the tailor is profoundly knowing on the 'sweating system; 'the son of Crispin vows and protests there's 'nothing like leather.' All these minus signs have a tendency to cancel each other: and thus the equation of life is worked out. Society has been said to have at all times the same want—namely, of one sane man, with adequate powers of expression to hold up each object of monomania in its right relations. 'The ambitious and mercenary bring their last new Mumbo-Jumbo—whether tariff, railway, mesmerism, or California—and by detaching the object from its relations, easily succeed in making it seen in a glare, and a multitude go mad about it; and they are not to be reproved or cured by the opposite multitude, who are kept from this particular insanity by an equal frenzy on another crotchet. But let one man have the comprehensive eye that can replace this isolated prodigy in its right neighbourhood and bearings, and the illusion vanishes—the returning reason of the community thanks the reason of the monitor.' There is perhaps nothing which more urgently calls for such a controlling and overseeing mind, to curb eccentric excesses, and to restore equilibrium of action, than philanthropy itself. In the enthusiasm of its impulses, it thinks it can afford to sneer at political economy, and that it is right to wander at its own sweet will, benevolently defying the remonstrances of all who have a method to propound, a science to explain, a system to uphold. Though the heart be large, yet the mind—as Nathaniel Hawthorne somewhere observes—is often of such moderate dimensions, as to be exclusively filled up with one idea; and thus, when a good man has long devoted himself to a particular kind of beneficence, to one species of reform, he is apt to become narrowed into the limits of the path wherein he treads, and to fancy that there is no other good to be done on earth but that selfsame good to which he has put his hand, and in the very mode that best suits his own conceptions. 'All else is worthless; his scheme must be wrought out by the united strength of the whole world's stock of love, or the world is no longer worthy of a position in the universe. Moreover, powerful truth, being the rich grape-juice expressed from the vineyard of the ages, has an intoxicating quality when imbibed by any but a powerful intellect, and often, as it were, impels the quaffer to quarrel in his cups.' Even a saint with one idea may be a plague to his neighbourhood; and, by being canonised, may retard, not further, the progress of his church.
Let us own, however, that one-idea'd people are often amusing as well as mischievous—or rather, when not mischievous. The rapt devotion they pay to their idola specûs oscillates between the sublime and the ridiculous. We have all seen such people, and alternately admired and laughed at them. We have all witnessed or read pleasant illustrations of their doings. With one such illustration we conclude this discursive fragment. It is related by the witty author of A Defence of Ignorance, who introduces it in the course of an imaginary dialogue on one-sided university training, in which one of the speakers (at dessert) says to his companion: 'If you reach after that pear, without considering what stands against your elbows, you may empty a decanter over me. He who desires thoroughly to know one subject, should be possessed of so much intellectual geography as will enable him to see its true position in the universe of thought.' The allusion to upsetting a decanter reminds the other interlocutor of a story, which he proceeds to tell. A gentleman who carved a goose was inexpert; and thinking only of the stubborn joints that would not be unhinged, he totally forgot the gravy. Presently, the goose slipped off the dish, and escaped into his neighbour's lap. Now, to have thrown a hot goose on a lady's lap would disconcert most people, but the gentleman in question was not disconcerted. Turning round, with a bland smile, he said: 'I'll trouble you for that goose.' Here we have a sublime example of a man with one idea. This gentleman's idea was the goose; and in the absorbing interest attached to his undertaking, that he was to carve the goose, not altogether knowing how, he had shut out extraneous objects. Suddenly the goose was gone, but his eye followed it, his mind was wrapt up in his struggle with it; what did he know of that lady? 'I'll trouble you for that goose,' expressed the perfect abstraction of a mind bent on developing its one idea.
MR KIRBY THE NATURALIST.
The popular fame of Mr Kirby rests upon the Introduction to Entomology, a work (partly written by him) full of interesting facts respecting the economy of the insect world. Amongst the scientific, his reputation depends on a variety of elaborate papers which he wrote for learned societies on subjects connected with natural history. For sixty years previous to the conclusion of his long life in 1850, he had devoted the leisure of a parsonage to that delightful study, and being a diligent and accurate observer, and an elegant and entertaining writer, he had attained the highest rank amongst the British naturalists of his day. It appears, from a memoir just published,[2] that Mr Kirby was born in 1759, and settled in 1782 in the cure of Barham, near Ipswich, where he was ultimately rector, and which he only left for his last long-home sixty-eight years thereafter. In an age of sluggish theology, he was an earnest minister and zealous controversialist, all the time that he was cultivating a taste for natural objects. This is equally unexpected and creditable. And yet it does not appear that his personal conduct was characterised by anything like rigour, for, as an example, we find, from the journal of an entomological excursion in 1797, that it was commenced on a Sunday afternoon, and involved one other Sunday of constant travelling. A reference of the dates to an almanac enables us to establish this fact, so unlike the spirit of a zealous man in our times.
Of the sister sciences of nature, botany first attracted Mr Kirby's regards. 'This he pursued in no hasty or superficial manner, but with the greatest perseverance and research. It was not enough for him to know a plant by sight, and to ascertain its proper name, but he compared the minutest parts of inflorescence and fructification; he sought for the most trifling differences in those nearly allied, and studied with a keen but generous criticism the various theories of writers on the science, from the earliest age to the time of the immortal Linnè. Of every plant he met with, even to the daisy and primrose, the whole physiological structure was thoroughly investigated; he discovered, or rather observed, what it was which enabled some plants to endure great changes of temperature, while others perished—the formation which enabled some to live in water, while others flourished in the most dry and arid sands; he carefully marked the causes which combined to clothe even rocks with verdure, in consequence of the wonderful structure of the plants inhabiting them, enabling them to live as it were by the suction of their numerous mouths, rather than by nourishment transmitted by a root in contact with that which would refuse to yield the ordinary food of plants. And as he thus marked all these peculiar adaptations of plants to their respective situations, his mind was by a constant train of thought directed from the beauty and wondrous mechanism of the creature, to contemplate the supreme and ineffable glory of the Creator.'
With a mind so predisposed and so fitted for the study of entomology, a casual occurrence of a trivial nature was sufficient to awaken and give it direction. 'Observing accidentally, one morning, a very beautiful golden bug creeping on the sill of my window, I took it up to examine it, and finding that its wings were of a more yellow hue than was common to my observation of these insects before, I was anxious carefully to examine any other of its peculiarities; and finding that it had twenty-two beautiful clear black spots upon its back, my captured animal was imprisoned in a bottle of gin, for the purpose, as I supposed, of killing him. On the following morning, anxious to pursue my observation, I took it again from the gin, and laid it on the window-sill to dry, thinking it dead; but the warmth of the sun very soon revived it: and hence commenced my further pursuit of this branch of natural history.'
A Dr Gwyn of Ipswich was his preceptor in this study. 'Though now in his seventy-fifth year, so much was the good old doctor interested in the pursuit of his friend, that he would frequently walk over to Barham, a distance of five miles, to see what had been the success of recent perambulations. The parsonage-house was then approached by a narrow wicket, with posts higher than the gate, and often, while working in his garden, or sitting in his parlour, Mr Kirby would look up and see, to his great delight, the shovel hat of his facetious friend adorning one post, and the cumbrous wig and appertaining pig-tail ornamenting the other. And soon the kind old man would walk in with his bald head, as he used to say, cool and ready for the investigation. These visits were always hailed with pleasure, the delights of which were still fresh in the memory of Mr Kirby, and would call forth expressions of affectionate gratitude, even when nearly half a century had elapsed, after his friend and Mæcenas, as he loved to call him, had gone to his rest.'
There seems no room to doubt, that his studies tended not merely to the happiness of Mr Kirby's life, but to its duration. It is at the same time abundantly evident, that much hard work was undergone. He carried on a most laborious correspondence with other naturalists, often extending a letter to the dimensions of a pamphlet: this altogether over and above his practical researches and his published writings. He took good-humoured views of most things, and was not easily put out of temper. A slight dash of absence of mind increased that quaintness of character so often found in zealous students. On an entomological excursion with two friends, Mr Marsham and Mr Macleay, it happened on their arriving at an old-fashioned wayside inn, that 'there was only one large room for them, with three beds in it. The arrangement having been made for the night, according to the custom of the time, three nightcaps were laid upon the dressing-table. Mr Kirby retired before his companions, and was soon sound asleep. Perceiving no caps ready for them, his friends inquired for what they considered the due appurtenances of the pillow: they were assured by the hostess that three nightcaps were laid upon the table, but they stoutly averred they had not seen them; the landlady no less stoutly maintaining her side of the question. What actually passed in her own mind did not transpire, but she appealed to the first gentleman as being the only one who could throw light upon the subject; when, lo and behold! as soon as his head appeared, in answer to the hasty summons, the three nightcaps appeared at the same time upon it, one being dragged over the other, much to the amusement not only of those present, but also of those who long after heard the tale.'