Healing is a broad term which encompasses both physical, as well as spiritual, and emotional concepts. Physical healing is the process by which the body’s cells regenerate and repair. In spiritual, emotional, or mental healing, however, not just they body’s cells are at work. Healing may need the help of thought, prayer, energy, or other means. In faith healing, for example, individuals resort to prayer, mental practices, spiritual insights, and other techniques in order to prevent or cure disease and improve health. In most alternative medicine techniques, it is believed that the body has a natural ability to heal itself. What is often necessary is the aid of another, a practitioner, to encourage the natural healing process.