Repose and control of the body are taught by postures and positions. When a person has been still for some time, he will begin to move. There is no need for him to move but he moves his foot or his arm, or he drums on the table with his fingers, or he chews his lips, or blinks his eyes. The activity increases more and more until at last a person jumps in his sleep; when the first sleep comes, he starts and jumps. To control the activity of the body, to sit quiet in the postures and positions is the first lesson.