So long as the processes of healing were not understood and man thought that the power to heal resided in substances and things outside of him, he logically sought for extrinsic means of healing, and a healing art was a logical development. The system of medicine, as we know it today, was a logical development out of the fallacy that healing power resides in extrinsic sources.
Herbert M. Shelton, Rubies in the Sand
disease, healing, health, illness, medical, medicine