Home Education Read-A-Long (pp. 111-114)
VI.—THE PHYSIOLOGY OF HABIT
VI.—THE PHYSIOLOGY OF HABIT
A work of Dr Carpenter’s was perhaps the first which gave me the clue I was in search of. In his Mental Physiology—a most interesting book, [p 112] by the way—he works out the analogy between mental and physical activity, and shows that the correspondence in effect is due to a correspondence in cause.
Growing Tissues form themselves to Modes of Action.—To state roughly the doctrine of the school Dr Carpenter represents—the tissues, as muscular tissue, for instance, undergo constant waste and as constant reparation. Even those modes of muscular action which we regard as natural to us, as walking and standing erect, are in reality the results of a laborious education; quite as much so as many modes of action which we consciously acquire, as writing or dancing; but the acquired modes become perfectly easy and natural. Why? Because it is the law of the constantly growing tissues that they should form themselves according to the modes of action required of them. In a case where the brain is repeatedly sending down to the muscles, under nervous control as they are, the message to have a certain action done, that action becomes automatic in the lower centre, and the faintest suggestion from outside comes to produce it without the intervention of the brain. Thus, the joints and muscles of the child’s hand very soon accommodate themselves to the mode of action required of them in holding and guiding the pen. Observe, it is not that the child learns with his mind how to use his pen, in spite of his muscles; but that the newly growing muscles themselves take form according to the action required of them. And here is the explanation of all the mountebank feats which appear simply impossible to the untrained looker-on. They are impossible to him, because his joints and muscles have not the same powers which [p 113] have been produced in the mountebank by a process of early training.
Therefore Children should learn Dancing, Swimming, etc., at an Early Age.—So much for mere bodily activities. And here we have the reason why children should learn dancing, riding, swimming, calisthenics, every form of activity which requires a training of the muscles, at an early age: the fact being, that muscles and joints have not merely to conform themselves to new uses, but to grow to a modified pattern; and this growth and adaptation take place with the greatest facility in early youth. Of course, the man whose muscles have kept the habit of adaptation picks up new games, new muscular exercises, without very great labour. But teach a ploughman to write, and you see the enormous physical difficulty which unaccustomed muscles have in growing to any new sort of effort. Here we see how important it is to keep watch over the habits of enunciation, carriage of the head, and so on, which the child is forming hour by hour. The poke, the stoop, the indistinct utterance, is not a mere trick to be left off at pleasure ‘when he is older and knows better,’ but is all the time growing into him becoming a part of himself, because it is registered in the very substance of his spinal cord. The part of his nervous system where consciousness resides (the brain) has long ago given a standing order, and such are the complications of the administration, that to recall the order would mean the absolute re-making of the parts concerned. And to correct bad habits of speaking, for instance, it will not be enough for the child to intend to speak plainly and to try to speak plainly; he will not be able to do so habitually until some degree [p 114] of new growth has taken place in the organs of voice whilst he is making efforts to form the new habit.
Moral and Mental Habits make their Mark upon Physical Tissues.—But, practically, everybody knows that the body, and every part of the body, accommodates itself very readily to the uses it is put to: we know that if a child accustom herself to stand on one foot, thus pushing up one shoulder, the habit will probably end in curvature of the spine; that to permit drooping shoulders, and, consequently, contracted chest, is to prepare the way for lung disease. The physical consequences of bad habits of this sort are so evident, that we cannot blind ourselves to the relation of cause and effect. What we are less prepared to admit is, that habits which do not appear to be in any sense physical—a flippant habit, a truthful habit, an orderly habit—should also make their mark upon a physical tissue, and that it is to this physical effect the enormous strength of habit is probably due. Yet when we consider that the brain, the physical brain, is the exceedingly delicate organ by means of which we think and feel and desire, love and hate and worship, it is not surprising that that organ should be modified by the work it has to do; to put the matter picturesquely, it is as if every familiar train of thought made a rut in the nervous substance of the brain into which the thoughts run lightly of their own accord, and out of which they can only be got by an effort of will.
Persistent Trains of Thought.—Thus, the mistress of the house knows that when her thoughts are free to take their own course, they run to cares of the house or the larder, to to-morrow’s dinner or the winter’s clothing; that is, thought runs into the rut [p 115] which has been, so to speak, worn for it by constant repetition. The mother’s thoughts run on her children, the painter’s on pictures, the poet’s on poems; those of the anxious head of the house on money cares, it may be, until in times of unusual pressure the thoughts beat, beat, beat in that well-worn rut of ways and means, and decline to run in any other channel, till the poor man loses his reason, simply because he cannot get his thoughts out of that one channel made in the substance of his brain. And, indeed, “that way madness lies” for every one of us, in the persistent preying of any one train of thought upon the brain tissue. Pride, resentment, jealousy, an invention that a man has laboured over, an opinion he has conceived, any line of thought which he has no longer the power to divert, will endanger a man’s sanity.
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