The periods devoted to rest are not as profitable as they should be unless they are actually devoted to recuperation. It may be that some of the time supposed to be devoted to rest should be devoted to thoughts of toil. Again during the hours of work there should be a freedom from jerkiness, breathlessness, nervousness, and anxiety. It is not necessarily true that the greatest and most constant display of energy accompanies the greatest presence of energy. The tugboat in the river is constantly blowing off steam and making a tremendous display of energy, while the ocean liner proceeds on its way without noise and without commotion. The still current runs <p 213> deep, and the man who is actually accomplishing the most is frequently--perhaps always the man who is making the least display of his strength. He can afford to be calm and collected, for he is equal to his task. The man who frets and fumes, who is nervous and excited, who is strung up to such a pitch that energy is being dissipated in all directions-- such a man proclaims his weakness from the housetop. _Many business men know they are going at a pace that kills, and at the same time they feel that they are accomplishing too little. For such, the pertinent question is, How may I reduce the expenditure of energy without reducing the efficiency of my labor_? The ability to relax at will and to remain in an efficient condition, but free from nervousness, is a thing which may be acquired more or less completely by all persons. It is accomplished by a voluntary control of the muscles of the arms, legs, and face, by breathing slowly and deeply, and by placing the body in a condition of general relaxation. <p 214> This antecedent condition of relaxation brings all the forces of the mind and body more completely under control and makes it possible to marshal them more effectively. It also gives one a feeling of control and assurance, which minimizes the possibility of confusion and embarrassment in the presence of an important task. The possibility of developing the power of relaxation by means of special training is being taken advantage of in teaching acts of skill, in all forms of mental therapeutics, and in numerous other instances where overtension hinders the acquisition or accomplishment of a useful act. By assuming the attitude of assurance and composure, the actual condition is produced in a manner most astonishing to those who have never attempted it. No man can do his best when he is hurried and fearful, when he is expending energy in a manner as useless as a tug blowing off steam. That relief is within his own power seems to him impossible. He is not aware of his power of will to change from his state of anxiety to one of composure. <p 215>