It is indeed surprising that the above-mentioned manifestations all occurred in periods in which medicine had already acknowledged the physico-mechanical interpretation of all organic processes; but the strangeness of this fact is enhanced by the consideration that, even in recent times, and even at the present moment, there have been, and are, individuals who not only preach the doctrine that medicine is bound to be subordinate to Christian faith, but also find adherents to their dogmas, and find them in surprising numbers. Recently we have learned from two exceedingly instructive examples to what extremes the sentiment of fanatical religion may lead men so soon as they shake off the steadying influence of physico-mechanical ideas in their theory of life. Then Theocracy strives for an exclusive ascendancy in the domain of medicine, as is distinctly shown by the position taken by Mrs. Eddy, with her “Christian Science,” and Rev. John Alexander Dowie, with his “Christian Catholic Church of Zion.” If we first of all examine the system of Mrs. Eddy, we find it an absurd farrago of undigested philosophical odds and ends, illogical medical aphorisms, and shallow investigation, which reaches its pitch of folly in the belief that disease has no real foundation in the material tissues of the body, but should be explained as arising exclusively from certain conditions of the mind. In accordance with this conception, which has been borrowed from a natural philosophy long since relegated to oblivion, the services both of physician and physic are to be rejected, and the treatment of the sick is to be carried on in such a manner that the patient, under supervision of an individual expert in such affairs, is merely to fix his mind on the spiritual, or divine, principle inherent in himself.