Does the Exercise of Mediumship Harm the Medium?

No more than any other work. In fact, it is distinctly beneficial if combined with proper exercise, relaxation, and recreation, which everybody should have. Some Mediums have an inclination to overwork and are then harmed just as anyone would be who carried any occupation to excess. We know of many cases in which Mediums have been benefited physically and mentally, by their work, to an astonishing extent.