Let us consider the question of relaxation and try to see just what it means. In order to better comprehend it let us first consider its opposite—contraction. When we wish to contract a muscle, in order that we may perform some action, we send an impulse from the brain to the muscle, an extra supply of Prana being conveyed to it, and the muscle contracts. The Prana travels over the motor nerves, reaches the muscle and causes it to draw its ends together and to thus exert a pull upon the limb or part which we wish to move, bringing it into action. If we wish to dip our pen into the inkwell, our desire manifests into action by our brain sending a current of Prana to certain muscles in our right arm, hand and fingers, and the muscles, contracting in turn, carry our pen to the inkwell, dip it in, and bring it back to our paper. And so with every act of the body, conscious or unconscious. In the conscious act the conscious faculties send a message to the Instinctive Mind, which immediately obeys the order by sending the current of Prana to the desired part. In the unconscious movement the Instinctive Mind does not wait for orders, but attends to the whole work itself, both the ordering and the executing. But every action, conscious or unconscious, uses up a certain amount of Prana, and if the amount so used is in excess of the amount which the system has been in the habit of storing the result is that one becomes weakened and generally "used up." The fatigue of a particular muscle is somewhat different, and results from the unaccustomed work it has been called upon to perform, because of the unusual amount of Prana which has been directed toward contracting it.
