Everyone knows what it is to start a piece of work, either intellectual or muscular, feeling stale — or oold, as an Adirondack guide once put it to me. And everybody knows what it is to “warm up” to his job. The process of warming up gets particularly striking in the phenomenon known as “second wind.” On usual occasions we make a practice of stopping an occupation as soon as we meet the first effective layer (so to call it) of fatigue. We have then walked, played, or worked “enough,” so we desist. That amount of fatigue is an efficacious obstruction on this side of which our usual life is cast. But if an unusual necessity forces us to press onward a surprising thing occurs. The fatigue gets worse up to a certain critical point, when gradually or suddenly it passes away, and we are fresher than before. We have evidently tapped a level of new energy, masked until then by the fatigue-obstacle usually obeyed. There may be layer after layer of this experience. A third and a fourth “wind” may supervene. Mental activity shows the phenomenon as well as physical, and in exceptional cases we may find, beyond the very extremity of fatigue-distress, amounts of ease and power that we never dreamed ourselves to own — sources of strength habitually not taxed at all, because habitually we never push through the obstruction, never pass those early critical points.

For many years I have mused on the phenomenon of second wind, trying to find a physiological theory. It is evident that our organism has stored-up reserves of energy that are ordinarily not called upon, but that may be called upon: deeper and deeper strata of combustible or explosible material, discontinuously arranged, but ready for use by anyone who probes so deep, and repairing themselves by rest as well as do the superficial strata. Most of us continue living unnecessarily near our surface. Our energy-budget is like our nutritive budget. Physiologists say that a man is in “nutritive equilibrium” when day after day he neither gains nor loses weight. But the odd thing is that this condition may obtain on astonishingly different amounts of food. Take a man in nutritive equilibrium, and systematically increase or lessen his rations. In the first case he will begin to gain weight, in the second case to lose it. The change will be greatest on the first day, less on the second, less still on the third; and so on, till he has gained all that he will gain, or lost all that he will lose, on that altered diet. He is now in nutritive equilibrium again, but with a new weight; and this neither lessens nor increases because his various combustion-processes have adjusted themselves to the changed dietary. He gets rid, in one way or another, of just as much N, C, H, etc., as he takes in per diem.

Just so one can be in what I might call “efficiency-equilibrium” (neither gaining nor losing power when once the equilibrium is reached) on astonishingly different quantities of work, no matter in what direction the work may be measured. It may be physical work, intellectual work, moral work, or spiritual work.

Of course there are limits: the trees don’t grow into the sky. But the plain fact remains that men the world over possess amounts of resource which only very exceptional individuals push to their extremes of use. But the very same individual, pushing his energies to their extreme, may in a vast number of cases keep the pace up day after day, and find no “reaction” of a bad sort, so long as decent hygienic conditions are preserved. His more active rate of energizing does not wreck him; for the organism adapts itself, and as the rate of waste augments, augments correspondingly the rate of repair.

I say the rate and not the time of repair. The busiest man needs no more hours of rest than the idler. Some years ago Professor Patrick, of the Iowa State University, kept three young men awake for four days and nights. When his observations on them were finished, the subjects were permitted to sleep themselves out. All awoke from this sleep completely refreshed, but the one who took longest to restore himself from his long vigil only slept one-third more time than was regular with him.

If my reader will put together these two conceptions, first, that few men live at their maximum of energy, and second, that anyone may be in vital equilibrium at very different rates of energizing, he will find, I think, that a very pretty practical problem of national economy, as well as of individual ethics, opens upon his view. In rough terms, we may say that a man who energizes below his normal maximum fails by just so much to profit by his chance at life; and that a nation filled with such men is inferior to a nation run at higher pressure. The problem is, then, how can men be trained up to their most useful pitch of energy? And how can nations make such training most accessible to all their sons and daughters. This, after all, is only the general problem of education, formulated in slightly different terms.

“Rough” terms, I said just now, because the words “energy” and “maximum” may easily suggest only quantity to the reader’s mind, whereas in measuring the human energies of which I speak, qualities as well as quantities have to be taken into account. Everyone feels that his total power rises when he passes to a higher qualitative level of life.

Writing is higher than walking, thinking is higher than writing, deciding higher than thinking, deciding “no” higher than deciding “yes”— at least the man who passes from one of these activities to another will usually say that each later one involves a greater element of inner work than the earlier ones, even though the total heat given out or the foot-pounds expended by the organism, may be less. Just how to conceive this inner work physiologically is as yet impossible, but psychologically we all know what the word means. We need a particular spur or effort to start us upon inner work; it tires us to sustain it; and when long sustained, we know how easily we lapse. When I speak of “energizing,” and its rates and levels and sources, I mean therefore our inner as well as our outer work.

Let no one think, then, that our problem of individual and national economy is solely that of the maximum of pounds raisable against gravity, the maximum of locomotion, or of agitation of any sort, that human beings can accomplish. That might signify little more than hurrying and jumping about in inco-ordinated ways; whereas inner work, though it so often reinforces outer work, quite as often means its arrest. To relax, to say to ourselves (with the “new thoughters”) “Peace! be still!” is sometimes a great achievement of inner work. When I speak of human energizing in general, the reader must therefore understand that sum-total of activities, some outer and some inner, some muscular, some emotional, some moral, some spiritual, of whose waxing and waning in himself he is at all times so well aware. How to keep it at an appreciable maximum? How not to let the level lapse? That is the great problem. But the work of men and women is of innumerable kinds, each kind being, as we say, carried on by a particular faculty; so the great problem splits into two sub-problems, thus:

(1). What are the limits of human faculty in various directions?

(2). By what diversity of means, in the differing types of human beings, may the faculties be stimulated to their best results?

Read in one way, these two questions sound both trivial and familiar: there is a sense in which we have all asked them ever since we were born. Yet as a methodical programme of scientific inquiry, I doubt whether they have ever been seriously taken up. If answered fully; almost the whole of mental science and of the science of conduct would find a place under them. I propose, in what follows, to press them on the reader’s attention in an informal way.

The first point to agree upon in this enterprise is that as a rule men habitually use only a small part of the powers which they actually possess and which they might use under appropriate conditions.

Every one is familiar with the phenomenon of feeling more or less alive on different days. Every one knows on any given day that there are energies slumbering in him which the incitements of that day do not call forth, but which he might display if these were greater. Most of us feel as if a sort of cloud weighed upon us, keeping us below our highest notch of clearness in discernment, sureness in reasoning, or firmness in deciding. Compared with what we ought to be, we are only half awake. Our fires are damped, our drafts are checked. We are making use of only a small part of our possible mental and physical resources. In some persons this sense of being cut off from their rightful resources is extreme, and we then get the formidable neurasthenic and psychasthenic conditions with life grown into one tissue of impossibilities, that so many medical books describe.

Stating the thing broadly, the human individual thus lives usually far within his limits; he possesses powers of various sorts which he habitually fails to use. He energizes below his maximum, and he behaves below his optimum. In elementary faculty, in co-ordination, in power of inhibition and control, in every conceivable way, his life is contracted like the field of vision of an hysteric subject — but with less excuse, for the poor hysteric is diseased, while in the rest of us it is only an inveterate habit — the habit of inferiority to our full self — that is bad.

Admit so much, then, and admit also that the charge of being inferior to their full self is far truer of some men than of others; then the practical question ensues: to what do the better men owe their escape? and, in the fluctuations which all men feel in their own degree of energizing, to what are the improvements due, when they occur?

In general terms the answer is plain:

Either some unusual stimulus fills them with emotional excitement, or some unusual idea of necessity induces them to make an extra effort of will. Excitements, ideas, and efforts, in a word, are what carry us over the dam.

In those “hyperesthetic” conditions which chronic invalidism so often brings in its train, the dam has changed its normal place. The slightest functional exercise gives a distress which the patient yields to and stops. In such cases of “habit-neurosis” a new range of power often comes in consequence of the “bullying-treatment,” of efforts which the doctor obliges the patient, much against his will, to make. First comes the very extremity of distress, then follows unexpected relief. There seems no doubt that we are each and all of us to some extent victims of habit-neurosis. We have to admit the wider potential range and the habitually narrow actual use. We live subject to arrest by degrees of fatigue which we have come only from habit to obey. Most of us may learn to push the barrier farther off, and to live in perfect comfort on much higher levels of power.

Country people and city people, as a class, illustrate this difference. The rapid rate of life, the number of decisions in an hour, the many things to keep account of, in a busy city man’s or woman’s life, seem monstrous to a country brother. He does n’t see how we live at all. A day in New York or Chicago fills him with terror. The danger and noise make it appear like a permanent earthquake. But settle him there, and in a year or two he will have caught the pulse-beat. He will vibrate to the city’s rhythms; and if he only succeeds in his avocation, whatever that may be, he will find a joy in all the hurry and the tension, he will keep the pace as well as any of us, and get as much out of himself in any week as he ever did in ten weeks in the country.

The stimuli of those who successfully spend and undergo the transformation here, are duty, the example of others, and crowd-pressure and contagion. The transformation, moreover, is a chronic one: the new level of energy becomes permanent. The duties of new offices of trust are constantly producing this effect on the human beings appointed to them. The physiologists call a stimulus “dynamogenic” when it increases the muscular contractions of men to whom it is applied; but appeals can be dynamogenic morally as well as muscularly. We are witnessing here in America today the dynamogenic effect of a very exalted political office upon the energies of an individual who had already manifested a healthy amount of energy before the office came.

Humbler examples show perhaps still better what chronic effects duty’s appeal may produce in chosen individuals. John Stuart Mill somewhere says that women excel men in the power of keeping up sustained moral excitement. Every case of illness nursed by wife or mother is a proof of this; and where can one find greater examples of sustained endurance than in those thousands of poor homes, where the woman successfully holds the family together and keeps it going by taking all the thought and doing all the work — nursing, teaching, cooking, washing, sewing, scrubbing, saving, helping neighbors, “choring” outside — where does the catalogue end? If she does a bit of scolding now and then who can blame her? But often she does just the reverse; keeping the children clean and the man good tempered, and soothing and smoothing the whole neighborhood into finer shape.

Eighty years ago a certain Montyon left to the Académie Fran?aise a sum of money to be given in small prizes, to the best examples of “virtue” of the year. The academy’s committees, with great good sense, have shown a partiality to virtues simple and chronic, rather than to her spasmodic and dramatic flights; and the exemplary housewives reported on have been wonderful and admirable enough. In Paul Bourget’s report for this year we find numerous cases, of which this is a type; Jeanne Chaix, eldest of six children; mother insane, father chronically ill. Jeanne, with no money but her wages at a pasteboard-box factory, directs the household, brings up the children, and successfully maintains the family of eight, which thus subsists, morally as well as materially, by the sole force of her valiant will. In some of these French cases charity to outsiders is added to the inner family burden; or helpless relatives, young or old, are adopted, as if the strength were inexhaustible and ample for every appeal. Details are too long to quote here; but human nature, responding to the call of duty, appears nowhere sublimer than in the person of these humble heroines of family life.

Turning from more chronic to acuter proofs of human nature’s reserves of power, we find that the stimuli that carry us over the usually effective dam are most often the classic emotional ones, love, anger, crowd-contagion or despair. Despair lames most people, but it wakes others fully up. Every siege or shipwreck or polar expedition brings out some hero who keeps the whole company in heart. Last year there was a terrible colliery explosion at Courrieres in France. Two hundred corpses, if I remember rightly, were exhumed. After twenty days of excavation, the rescuers heard a voice. “Me voici,” said the first man unearthed. He proved to be a collier named Nemy, who had taken command of thirteen others in the darkness, disciplined them and cheered them, and brought them out alive. Hardly any of them could see or speak or walk when brought into the day. Five days later, a different type of vital endurance was unexpectedly unburied in the person of one Berton who, isolated from any but dead companions, had been able to sleep away most of his time.

A new position of responsibility will usually show a man to be a far stronger creature than was supposed. Cromwell’s and Grant’s careers are the stock examples of how war will wake a man up. I owe to Professor C. E. Norton, my colleague, the permission to print part of a private letter from Colonel Baird–Smith written shortly after the six weeks’ siege of Delhi, in 1857, for the victorious issue of which that excellent officer was chiefly to be thanked. He writes as follows:

“ . . . My poor wife had some reason to think that war and disease between them had left very little of a husband to take under nursing when she got him again. An attack of camp-scurvy had filled my mouth with sores, shaken every joint in my body, and covered me all over with sores and livid spots, so that I was marvellously unlovely to look upon. A smart knock on the ankle-joint from the splinter of a shell that burst in my face, in itself a mere bagatelle of a wound, had been of necessity neglected under the pressing and incessant calls upon me, and had grown worse and worse till the whole foot below the ankle became a black mass and seemed to threaten mortification. I insisted, however, on being allowed to use it till the place was taken, mortification or no; and though the pain was sometimes horrible I carried my point and kept up to the last. On the day after the assault I had an unlucky fall on some bad ground, and it was an open question for a day or two whether I hadn’t broken my arm at the elbow. Fortunately it turned out to be only a severe sprain, but I am still conscious of the wrench it gave me. To crown the whole pleasant catalogue, I was worn to a shadow by a constant diarrhoea, and consumed as much opium as would have done credit to my father-inlaw [Thomas De Quincey]. However, thank God, I have a good share of Tapleyism in me and come out strong under difficulties. I think I may confidently say that no man ever saw me out of heart, or ever heard one croaking word from me even when our prospects were gloomiest. We were sadly scourged by the cholera, and it was almost appalling to me to find that out of twenty-seven officers present, I could only muster fifteen fo............