Some have tapped the power in these postures to kindle the body's own natural healing forces. This may happen if two conditions are provided. First, the posture must be assumed along with inheld breath. Second, it must be sustained for as long as possible without change. Third, the mind must be concentrated at the same time upon the bodily part affected and its perfect healthy condition inwardly "seen."
-- Notebooks Category 5: The Body > Chapter 5: Exercise > # 127