Or, again, relaxation in a milder form can hardly fail to be useful to everybody, and many people practise it unconsciously. The commonest form which is known to everyone is _stretching_ at the end of work, and for a few seconds afterwards remaining utterly relaxed. No one has ever stretched--we boldly assert this--without the subsequent relaxation, which, quite apart from the relief of a cramped position that stretching gives, gives rest to the body. Similarly, also, every sedentary brain-worker will find that he works best when he is most unconscious of his body, when the energy which would be employed in bracing limbs is left unoccupied for the brain to make use of. Mere stillness is of course not at all the same thing, for stillness may go with rigid stiffness. But the point of relaxation is that during work every muscle that is not employed in that work should have nothing whatever to do, and that after work no muscle should have anything to do if the work has been physical, and if mental that the brain should be empty. True the will has to say, “Holiday for all, holiday for all,” because all rest better so; but no more. _The energy of the whole frame is devoted to rest._ In the same way, just as when the brain bears the stress of exertion, the body should be completely relaxed, so when one part of the body, the arms or legs, for instance, are actively employed, and above all when storage of energy may be useful, the rest of the body not wanted should be trained to give no trouble, not to require the usage of energy. Innumerable instances of the truth of this present themselves, for in athletics “reserve,” “quietness of action,” all imply the unconscious storage of energy. Force employed is energy gone, and the less unnecessary energy one spends, the more there is left for endurance. Look at a practised racket player and one who does not know how to husband himself! The one takes two quiet steps and is in easy time, the other rushes to the corner, is there before there is any need, and has to make a call on his muscles to check himself. Result, one has expended no energy, practically speaking, in getting there, the other has parted with energy twice, once to start with violence, once to check himself with violence. This repeated twice a minute for half-an hour will leave one fresh, the other beaten.