But when the normal tasks and stimulations of life don't put a man's deeper levels of energy on tap, and he requires distinctly deleterious excitements, his constitution verges on the abnormal. The normal opener of deeper and deeper levels of energy is the will. The difficulty is to use it, to make the effort which the word volition implies. But if we do make it (or if a god, though he were only the god Chance, makes it through us), it will act dynamogenically on us for a month. It is notorious that a single successful effort of moral volition, such as saying "no" to some habitual temptation, or performing some courageous act, will launch a man on a higher level of energy for days and weeks, will give him a new range of power. "In the act of uncorking the whiskey bottle which I had brought home to get drunk upon," said a man to me, "I suddenly found myself running out into the garden, where I smashed it on the ground. I felt so happy and uplifted after this act, that for two months I was n't tempted to touch a drop."

The emotions and excitements due to usual situations are the usual inciters of the will. But these act discontinuously; and in the intervals the shallower levels of life tend to close in and shut us off. Accordingly the best practical knowers of the human soul have invented the thing known as methodical ascetic discipline to keep the deeper levels constantly in reach. Beginning with easy tasks, passing to harder ones, and exercising day by day, it is, I believe, admitted that disciples of asceticism can reach very high levels of freedom and power of will.

Ignatius Loyola's spiritual exercises must have produced this result in innumerable devotees. But the most venerable ascetic system, and the one whose results have the most voluminous experimental corroboration is undoubtedly the Yoga system in Hindustan.

From time immemorial, by Hatha Yoga, Raja Yoga, Karma Yoga, or whatever code of practice it might be, Hindu aspirants to perfection have trained themselves, month in and out, for years. The result claimed, and certainly in many cases accorded by impartial judges, is strength of character, personal power, unshakability of soul. In an article in the Philosophical Review,[2] from which I am largely copying here, I have quoted at great length the experience with "Hatha Yoga" of a very gifted European friend of mine who, by persistently carrying out for several months its methods of fasting from food and sleep, its exercises in breathing and thought-concentration, and its fantastic posture-gymnastics, seems to have succeeded in waking up deeper and deeper levels of will and moral and intellectual power in himself, and to have escaped from a decidedly menacing brain-condition of the "circular" type, from which he had suffered for years.

Judging by my friend's letters, of which the last I have is written fourteen months after the Yoga training began, there can be no doubt of his relative regeneration. He has undergone material trials with indifference, travelled third-class on Mediterranean steamers, and fourth-class on African trains, living with the poorest Arabs and sharing their unaccustomed food, all with equanimity. His devotion to certain interests has been put to heavy strain, and nothing is more remarkable to me than the changed moral tone with which he reports the situation. A profound modification has unquestionably occurred in the running of his mental machinery. The gearing has changed, and his will is available otherwise than it was.

My friend is a man of very peculiar temperament. Few of us would have had the will to start upon the Yoga training, which, once started, seemed to conjure the further willpower needed out of itself. And not all of those who could launch themselves would have reached the same results. The Hindus themselves admit that in some men the results may come without call or bell. My friend writes to me: "You are quite right in thinking that religious crises, love-crises, indignation-crises may awaken in a very short time powers similar to those reached by years of patient Yoga-practice."

Probably most medical men would treat this individual's case as one of what it is fashionable now to call by the name of "self-suggestion," or "expectant attention"—as if those phrases were explanatory, or meant more than the fact that certain men can be influenced, while others cannot be influenced, by certain sorts of ideas. This leads me to say a word about ideas considered as dynamogenic agents, or stimuli for unlocking what would otherwise be unused reservoirs of individual power.

One thing that ideas do is to contradict other ideas and keep us from believing them. An idea that thus negates a first idea may itself in turn be negated by a third idea, and the first idea may thus regain its natural influence over our belief and determine our behavior. Our philosophic and religious development proceeds thus by credulities, negations, and the negating of negations.

But whether for arousing or for stopping belief, ideas may fail to be efficacious, just as a wire, at one time alive with electricity, may at another time be dead. Here our insight into causes fails us, and we can only note results in general terms. In general, whether a given idea shall be a live idea depends more on the person into whose mind it is injected than on the idea itself. Which is the suggestive idea for this person, and which for that one? Mr. Fletcher's disciples regenerate themselves by the idea (and the fact) that they are chewing, and re-chewing, and super-chewing their food. Dr. Dewey's pupils regenerate themselves by going without their breakfast—a fact, but also an ascetic idea. Not every one can use these ideas with the same success.

But apart from such individually varying susceptibilities, there are common lines along which men simply as men tend to be inflammable by ideas. As certain objects naturally awaken love, anger, or cupidity, so certain ideas naturally awaken the energies of loyalty, courage, endurance, or devotion. When these ideas are effective in an individual's life, their effect is often very great indeed. They may transfigure it, unlocking innumerable powers which, but for the idea, would never have come into play. "Fatherland," "the Flag," "the Union," "Holy Church," "the Monroe Doctrine," "Truth," "Science," "Liberty," Garibaldi's phrase, "Rome or Death," etc., are so many examples of energy-releasing ideas. The social nature of such phrases is an essential factor of their dynamic power. They are forces of detent in situations in which no other force produces equivalent effects, and each is a force of detent only in a specific group of men.