That the age of the individual should make a vast difference in the capacity to acquire new habits and to modify old ones is obvious from the physiology of habit already described. When the brain and nervous system are both young, there are few neural connections established, and the organism is plastic to all stimuli. As the individual grows older, connections once made tend to be repeated and to be, as it were, unconsciously preferred by the nervous system. The capacity to form habits is most pronounced in the young child in whose nervous structure no one action rather than another has yet had a chance to be ingrained. The more connections that are made, the more habits that are acquired, the less, in a sense, can be made. For the organism will tend to repeat those actions to which it has previously been stimulated, and the more frequently it repeats them the more frequently it will tend to. So that, as William James pointed out, by twenty-five we are almost literally bundles of habits. When the majority of acts of life have become routine and fixed, it is almost impossible to acquire new ways of acting, since the acquisition of new habits seriously interferes with the old, and old habits physiologically stay put.
Habit as a time-saver. This fact, that habits can be acquired most easily early in life, and that those early acquired become so fixed that they are almost inescapable, is of supreme importance to the individual and society. It is in one sense a great advantage; it is an enormous saver of time. In the famous words of James:[1]
The great thing, then, in all education, is to make our nervous system our ally instead of our enemy. It is to fund and capitalize our acquisitions, and live at ease upon the interest of the fund. For this we must make automatic and habitual, as early as possible, as many useful actions as we can, and guard against the growing into ways that are likely to be disadvantageous to us, as we would guard against the plague. The more of the details of our daily life we can hand over to the effortless custody of automatism, the more our higher powers of mind will be set free for their own proper work. There is no more miserable human being than one in whom nothing is habitual but indecision, and for whom the lighting of every cigar, the drinking of every cup, the time of rising and going to bed every day, and the beginning of every bit of work, are subjects of express volitional deliberation. Full half the time of such a man goes to the deciding, or regretting, of matters which ought to be so ingrained in him as practically not to exist for his consciousness at all. If there be such daily duties not yet ingrained in any one of my readers, let him begin this very hour to set the matter right.[1]
[Footnote 1: James: Psychology, vol. I, p. 122.]
The ideal of efficiency is the ideal of having the effective thing habitually done with as little effort and difficulty as possible. This in the case of human beings is, as James points out, attained when good habits are early acquired and when as large a proportion as possible of purely routine activity is made effortless and below the level of consciousness. To do as many things as possible without thinking is to free thinking for new situations. Our experiences would be very restricted indeed if we could not reduce a large portion of the things we do to the mechanics of habit. Walking, eating, these, though partly instinctive, were once problems requiring thought, effort, and attention. If we had to spend all our lives learning to dress and undress, to find our way about our own house or city, to spell and to pronounce correctly, it is clear how little variety and diversity we should ever attain in our lives. By the time we are twenty these fundamental habits are so firmly fixed in us that, for better or for worse, they are ours for life, and we are free to give our attention to other things. Again in the words of James:
We all of us have a definite routine manner of performing certain daily offices connected with the toilet, with the opening and shutting of familiar cupboards, and the like. Our lower centers know the order of these movements, and show their knowledge by their "surprise" if the objects are altered so as to oblige the movement to be made in a different way. But our higher thought centers know hardly anything about the matter. Few men can tell off-hand which sock, shoe, or trousers-leg they put on first. They must first mentally rehearse the act; and even that is often insufficient—the act must be performed. So of the questions, Which valve of my double door opens first? Which way does my door swing? etc. I cannot tell the answer; yet my hand never makes a mistake. No one can describe the order in which he brushes his hair or teeth; yet it is likely that the order is a pretty fixed one in all of us.[1]
[Footnote 1: James: loc. cit., vol. I, p. 115.]
Habit as a stabilizer of action. Habit not only thus saves time, but stabilizes action, and where the habits acquired are effective ones, this is invaluable. Habits of prompt performance of certain daily duties on the part of the individual are a distinct benefit both to him and to others, as certain customary efficient office practices, when they are really habitual, immensely facilitate the operation of a business. On a larger scale habit is "society's most precious conservative agent." Individuals not only develop personal habits of dress, speech, etc., but become habituated to social institutions, to certain occupations, to the prestige attaching to some types of action and the punishment correlated with others. Education in the broadest sense is simply the acquisition of those habits which adapt an individual to his social environment. It is the instrument society uses to hand down the habits of thinking, feeling, and action which characterize a civilization. Society is protected from murder, theft, and pillage by law and the police, but it is even better protected by the fact that living together peacefully and coöperatively is for most adults habitual. In a positive sense the multifarious occupations and professions of a great modern city are carried on from day to day in all their accustomed detail, not because the lawyers, the business men, the teachers, who practice them continuously reason them out, nor from continuous instinctive promptings. They are striking testimony to the influence of habit. As a recent English writer puts it:
The population of London would be starved in a week if the flywheel of habit were removed, if no signalman or clerk or policeman ever did anything which was not suggested by a first-hand impulse, or if no one were more honest or punctual or industrious than he was led to be by his conscious love, on that particular day, for his master or for his work, or by his religion, or by a conviction of danger from the criminal law.[1]
[Footnote 1: Graham Wallas: Great Society, p. 74.]