Esoteric Healing by Alice Bailey.
Esoteric healing is a science based on a number of requirements, including knowledge of the constitution of man and the nature of the various bodies, both dense and subtle. To this practical knowledge, the science of occultism contributes vital information of the energy factors, the karmic and ray influences, the psychology and astrology of the soul, and the laws and rules fundamental to the safe and successful practice of esoteric healing.
In this book the seven ray techniques of healing are described; the laws and rules of healing are enumerated and discussed; the requirements for healing are given in detail; and basic causes of disease are shown. We learn, for example, that much disease can be karmic in origin; that certain diseases are inherent in the soil and in the substance of the planet; and that many others are psychological, arising in the emotional or mental bodies. Hence the need for a total and comprehensive understanding of the patient and of the correct and safe methods of healing.
We are also given a true understanding of death as the abstraction, or the withdrawal, of the soul from the body to continue life on its own plane without the limitation of the body, until a new cycle of incarnation and experience in form is necessary.