"I will confine myself to a class of diseases" (he wrote to the Boston "Transcript" in 1894) "with which my occupation has made me somewhat conversant. I mean the diseases of the nervous system and the mind.... Of all the new agencies that our day has seen, there is but one that tends steadily to assume a more and more commanding importance, and that is the agency of the patient's mind itself. Whoever can produce effects there holds the key of the situation in a number of morbid conditions of which we do not yet know the extent; for systematic experiments in this direction are in their merest infancy. They began in Europe fifteen years ago, when the medical world so tardily admitted the facts of hypnotism to be true; and in this country they have been carried on in a much bolder and more radical fashion by all those 'mind-curers' and 'Christian Scientists' with whose results the public, and even the profession, are growing gradually familiar. "I assuredly hold no brief for any of these healers, and must confess that my intellect has been unable to assimilate their theories, so far as I have heard them given. But their _facts_ are patent and startling; and anything that interferes with the multiplication of such facts, and with our freest opportunity of observing and studying them, will, I believe, be a public calamity. The law now proposed will so interfere, simply because the mind-curers will not take the examinations.... Nothing would please some of them better than such a taste of imprisonment as might, by the public outcry it would occasion, bring the law rattling down about the ears of the mandarins who should have enacted it. "And whatever one may think of the narrowness of the mind-curers, their logical position is impregnable. They are proving by the most brilliant new results that the therapeutic relation may be what we can at present describe only as a relation of one person to another person; and they are consistent in resisting to the uttermost any legislation that would make 'examinable' information the root of medical virtue, and hamper the free play of personal force and affinity by mechanically imposed conditions."