Another striking point of analogy between mental and bodily nourishment, is to be found in the effects of repletion, when too great a quantity of food is communicated at one time.—As the increase of a child's bodily strength does not depend upon the mere quantity of food forced into his stomach, but upon that portion only which is healthfully digested and assimilated; so in like manner, the amount of a child's knowledge will not correspond to the number of ideas forced upon his attention by the teacher, but to those only which have been reiterated by the mind, and committed by that process to the keeping of the memory. In both cases, the evil of repletion is two-fold; there is the waste of food and of labour, while the strength and the growth of the child, instead of being promoted, are retarded and diminished. The physical appetite gains strength, by moderate exercise; but it is palled and weakened by every instance of repletion. The desire for food is never for any length of time at rest, so long as the stomach is kept in proper tone by moderate and frequent feeding; and the quantity of food which a healthy child will in these circumstances consume, is often surprising. But whenever the stomach is gorged, then restlessness, uneasiness, and not unfrequently disease, are the consequences. The digestive powers are weakened, the tone of the stomach is relaxed, and, instead of the healthful craving for food which should occur at the proper interval, the appetite is destroyed, and food of every kind is nauseated.—Exactly similar is the case with the mental appetite. The natural curiosity of children, or, in other words, their desire of information, before it is checked or overloaded by mismanagement, is almost insatiable; and the astonishing amount of knowledge which they usually acquire between the ages of one and three years, while under the guidance of Nature, has been formerly alluded to. But this desire of information, and this capacity for receiving it, are by no means confined to that early period of their lives. The same appetite for knowledge would increase and acquire additional strength, were it but properly directed, or furnished with moderate and suitable means of gratification. But when a parent or teacher impatiently attempts to force it upon the child more rapidly than he can receive it,—that is, than he can reiterate it in his mind for himself,—he not only irritates and harasses the child, but his attempt neutralizes the effect of the ideas which the child would otherwise pleasantly and efficiently have received. Every such attempt to do more than enough greatly weakens the powers of the pupil's mind, and discourages him from any after attempt to increase his knowledge.
As a general maxim in the education of the young, it may here be observed, that as long as the understanding of a child remains clear, and he can distinctly perceive the truths which are communicated to him, he will find himself pleasantly and profitably employed, and will soon acquire a habit of distinct mental vision;—the powers of his mind will be rapidly expanded and strengthened, and he will receive and retain the knowledge communicated to him with ease and with pleasure. But when, on the contrary, he is overtasked, and more ideas are forced upon his attention than his capacity can receive, the mind becomes disturbed and confused, the mental perception becomes cloudy and indistinct, and all that is communicated in these circumstances is absolutely lost. If the parent or teacher insists on the pupil persevering in his mental meal, in the hope that things will get better, we can easily, from the present analogy, perceive the fallacy of such a hope. Perseverance will only create additional perplexity; the whole powers of the child's mind will become more and more enfeebled, or totally prostrated; the labour of the teacher will be lost; and he will find his pupil now, and for some time afterwards, much less able to take a clear and distinct view of any subject than he was before.
There is yet one other point of analogy between the supply of food for the body and the mind, to which we must also allude. It is to be found in the baneful, and often destructive, effects of unnatural stimulants applied to the mental appetite, which strikingly correspond in their effects to the pernicious habit of supplying stimulants to the young in their ordinary food.—Stimulants will no doubt, in both cases, produce for the time additional excitement;—but they are neither natural nor necessary. In all ordinary cases, Nature has made ample provision for the supposed want, of which the craving—the natural and healthy craving—of children for knowledge and for food, gives ample testimony. To counteract or to weaken this natural desire would be improper;—but artificially to increase it is always dangerous. The reason is obvious; for the excitement thus caused being unnatural, it is always temporary; but its pernicious effects very soon become extensive and permanent. Every physician knows, that the habitual use of stimulants in the food of the young, weakens the tone of the stomach, palls the appetite, creates a disrelish for plain and wholesome food, and frequently destroys the powers of digestion for ever after. Very similar are the effects of unnatural stimulants to the mental appetite in training and teaching the young, when these stimulants are habitually, or even frequently administered. Their curiosity,—their appetite for knowledge,—is naturally so vigorous, that the repetition, or the reading of any story, however commonplace or uninteresting to us, gives them the sincerest pleasure, provided only that they understand and can follow it. This is a most wise and beneficent provision of Nature, of which parents and teachers should be careful to take advantage. It is because of this disposition in children, that in all ordinary cases, the simplest narrative or anecdote in ordinary life, may be successfully employed in giving them mental strength, and in communicating permanent moral instruction. But whenever unnatural and injudicious excitements are used in their instruction, and the child's imagination has been stimulated and defiled by the ideas of giants and ogres, fairies and ghosts, the whole natural tone of the mind is destroyed, plain and even interesting stories and narratives lose their proper attraction, and a diseased and insatiable appetite for the marvellous and the horrible is generally created. Even to adults, and much more to children, whose minds have been thus abused, the plain paths of probability and truth have lost every charm; and the study of abstract but useful subjects becomes to them a nauseous task—an intolerable burden.
The accuracy of this analogy, we think, will readily be admitted by all. And if so, it will at least help to illustrate, if it does not prove, some of the important conclusions to which we shall find ourselves led upon other, and philosophical grounds. But as the prejudices which, during several centuries, have been gradually congregating around the science of education are so many and so powerful, every legitimate means, and this among others, should be combined for the purpose of removing them.
CHAP. III.
How Nature may be imitated in Communicating Knowledge to the Pupil, by the Reiteration of Ideas.
The phenomenon in mechanics and natural philosophy, which is popularly termed "Suction," may be exhibited in a thousand different ways, and yet all are the result of but one cause. When we witness the various phenomena of the air and common pump,—the barometer and the cupping glass,—the sipping of our tea, and the traversing of an insect on the mirror or the roof,—the operations appear so very dissimilar, that we are ready to attribute them to the action of a variety of agents. But it is not so;—for when we trace each of them back to its primitive cause, we find that each and all of these wonders are produced by the weight of the atmosphere, and that alone. In precisely the same manner, knowledge may apparently be communicated to the human mind in a thousand different ways; and yet, when we examine each, and trace it to its primitive cause, we find the phenomenon to be one—and one alone. The truth has been received and lodged with the memory,—made part of our knowledge—by the reiteration of its idea by the mind itself;—by an exercise of active, voluntary thought upon the knowledge thus communicated. The cause and the effect invariably follow each other both in old and young; for whenever a new idea is perceived and reiterated by the pupil,—if it should be but once,—the knowledge of the child is to that extent increased; but whenever this act of the mind is awanting, there can be no additional information received;—the increase of knowledge is found to be impossible. This appears to be a law of our Nature, to which we know of no exception.
It is also worthy of remark here, that the retention or permanence of the ideas thus committed to the keeping of the memory depends upon two circumstances. The first is, the vigour of the mental powers, or the intensity of the impression made upon them at the time of reiteration;—and the second, and certainly the principal circumstance, is the frequency of their reiteration by the mind. In evidence of the first we see, that a fall, a fright, or a narrow escape from imminent danger, although it occurred but once, and perhaps in early infancy, will be remembered through life; and in proof of the second, we find, that the scenes and circumstances of childhood being frequently and daily reiterated by the mind, at a time when it has little else to reiterate, remain permanently on the memory. The object therefore most to be desired by the teacher, is an exercise, or a series of exercises, by which, in his attempts to communicate knowledge to his pupil, this act of reiteration may be secured, and if possible repeated at pleasure, for more permanently fixing on the memory the knowledge communicated.