A classic Chinese text on Taoist meditation, this work has inspired many Ch'i-kung (Qigong) techniques for attaining health, happiness, and long life. The book describes the use of meditation in circulating energy, the role of breath, and the conservation of procreative energy. It is one of the few Taoist treatises to describe the landmarks of spiritual development and document the process of spiritual development from start to finish. 112 pp.