The principle of reserve energy, developed independently by Professor James and myself, is of the utmost importance to abnormal psychology. The principle is based on a broad generalization of facts—psychological, physiological and biological—namely, that far less energy is utilized by the individual than there is actually at his disposal. A comparatively small fraction of the total amount of energy, possessed by the organism, is used in its relation with the ordinary stimuli of its environment.

The energy in use may be regarded as kinetic or circulating energy, while the energy stored away is reserve energy. There must always be a supply of reserve energy requisite for unusual reactions in emergency cases. Those organisms survive which have the greatest amount of reserve energy, just as those countries are strong and victorious which possess the largest amount of reserve capital to draw upon in critical periods.

As life becomes more complex, inhibitions increase;[370] the thresholds of stimulations of a complex system rise in proportion to its complexity. With the rise of evolution there is a tendency to increase of inhibitions, with a consequent lock-up of energy which becomes reserve. Now there are occasions in the life of the individual, under the influence of training and emotional trauma, when the inhibitions become unusually intense, tending to smother the personality, which becomes weakened, impoverished in its reactions, and is unable to respond freely to the stimuli of its environment. The inhibited system becomes inactive and may be regarded as dissociated from the cycle of life.

In case of an emotional trauma there is often a breach in the continuity of association. The affected system becomes dissociated from the rest of the personality, and is like a splinter in the flesh of the individuality. Its own threshold, when tapped, may be very low, but it is not directly accessible through the mediacy of other systems; hence its threshold appears unusually or pathologically high. When the inhibitions are very high they must be removed. This removal of inhibitions brings about an access to the accumulated energy of the inhibited systems. In case of disjunction or break of continuity we must stimulate the dormant reserve energy of the systems, and thus assist the process of repair and bridge the breach of associative continuity. A new, fresh, active life opens to the patient. He becomes[371] a “reformed” personality, free and cheerful, with an overflow of energy.

The hypnoidal state is essentially a rest-state characterized by anabolic activity. There is a restitution of spent energy; inhibitions become removed, and access is gained to “dormant” systems or complexes. The awakened “dormant” complex systems bring with them a new feeling-tone, a fresh emotional energy resulting in an almost complete transformation of personality.

As an illustration of the transformation effected I take at random the following extracts from some of the letters written to me by patients who have experienced this welling up of reserve energy: “Indeed, were I to fill this entire sheet with expressions of the gratitude which wells up from my inmost heart it would be only a beginning of what I feel. Surely the darkness of the world has been dispelled since this new light has illuminated my soul, and I feel that this wondrous light will never fail me. It were vain to attempt to thank you for this wonderful transformation.”

A letter from a patient reads: “You will be glad to know that all is well with me. Life is one happy day. I am a marvel to my friends in the way of happiness and cheer. I have to confess that I feel almost wicked to be so happy.”

Another letter runs as follows: “Next to the gladness in my own restoration, I am rejoiced at the[372] wonderful transformation that has come to my dear friend T—— from your treatment. She writes me most enthusiastically of her steady and sure progress toward the goal of perfect health, of her strength to take up the home duties which had been so burdensome, and she now finds a delight in the doing of them, and of her husband’s and friends’ joy in the transformation that has been wrought in her.”

A patient writes: “Your treatments cut a deep channel in my subconscious life, one from which if I do happen to wander astray is for only a short time; then I............