Dr. H. C. Sawyer, author of “Nerve Waste,” has kindly shown the writer another form of functional or hysterical disorder, which was, or is even yet, considered by many general practitioners a scrofulous enlargement of the joints; but the doctor discovered the peculiarity of _metastasis_, which means a sudden or complete removal of a disease from one part to another. This gave the disease what he termed a hysterical or functional character. It would be the swelling of the elbow of one arm and the knee of the opposite side at one time; and in the course of a few weeks or months these would feel and appear entirely well, while the disease had located itself in other joints. This case the doctor considered could be only reached through the mind, or some faith cure. He further believed that many of these enlarged and swollen joints among the wealthier classes were due to a nervous trouble. Indeed, it would be an easy matter to cite case after case, from my own experience, or quote cases from the highest medical authorities, illustrating in every conceivable manner how the mind, the imagination, the emotions, or the different passions, are continually causing disease and suffering. It must naturally follow that what is potent to induce diseases will, under different conditions, be a means of curing them. A serious question now arises with reference to the selection of cases suitable to _mind-cure_ treatment. Bigoted fanaticism is quite incompetent, so are the great majority of spiritual healers, owing to their absolute ignorance of the scientific aspects of disease. The first prerequisite for intelligent and proper treatment is to establish the precise nature of the disease under consideration. It must be distinctly grouped or classed, whether it be a functional or hysterical disease, or a zymotic or contagious affection. In diphtheria or typhoid fever mind cure subserves no purpose; the treatment must be avowedly antiseptic and stimulating. If it be a physical injury, say a fractured bone, it must be treated on mechanical principles. A woman suffering in the pangs of labor, which is being delayed from some abnormal position or some other physical obstruction, can only be delivered through mechanical methods; and here the enthusiastic mind healer may commit serious errors, sacrificing limb and life by unnecessary delay. So I would lay down this broad maxim, that the mind healer must either be a competent, educated physician, or a physician should be a competent metaphysician.