The subject of healing is as old as history itself and has forever been a subject of investigation and experiment. Knowledge of the right use of healing practice and forces is in its infancy in our age. It is at least possible to now better comprehend the laws of magnetic healing and discover causes of diseases which originate in the three inner bodies: the etheric body, the astral body, and the mental body.
Only today is humanity at the point in the evolution of its consciousness where it can begin to realize the power of the subjective, the inner worlds. A key seems to be an open mind, a readiness to accept new theories and hypotheses, and to be willing to let go of the old and dearly held truths. "All initiates of the Ageless Wisdom are necessarily healers, though all may not heal the physical body. The reason for this is that all souls that have achieved any measure of true liberation are transmitters of spiritual energy. This automatically affects some aspect of the mechanism (or different aspects of the instrument - body or form nature) which is used by the souls they contact."
"All disease is the result of inhibited soul life, and that is true of all forms in all kingdoms. The art of the healer consists in releasing the soul so that its life can flow through the aggregate of organisms which constitute any particular form."
From Esoteric Healing by Alice A. Bailey