For these reasons one cannot help believing either that these letters have been liberally edited, or that their writers have been much influenced by reading or hearing of similar cases. This does not necessarily imply any charge of intentional deception, but weakens very considerably their value as evidence. _"Natural Selection" in the Christian Science Clinic_ The persistence of Christian Scientists in the belief that they can cure organic disease, a belief which I consider genuine in the majority of cases, is probably due to the following reason: By a curious process of "natural selection," a patient suffering from organic disease rarely consults a Christian Scientist, just as he rarely consults an osteopath. Being ignorant of diagnosis, the Christian Scientist is not aware of this fact and supposes that he is treating, not a selected group of cases of functional disease, but all disease. This mistake is all the more natural because the Christian Scientist, with the natural credulity of the half-educated, accepts the patient's own diagnosis at its face value or trusts the hearsay report of what some doctor is supposed to have said. The same interesting process of "natural selection" accounts for the fact that Christian Scientists are so rarely the cause of death to those whom they treat. It is undoubtedly true that deaths occasionally occur (for example, from diphtheria) which are directly traceable to the fatal inactivity and ignorance of a Christian Scientist. But such deaths are in my opinion rare. They are pretty sure to give rise to newspaper notoriety and so to become widely known, yet one does not hear of many such in the course of a year, for common sense steers the great majority of sufferers from organic disease away from the parlors of the Christian Scientist. "_Doctors Who Flood the World with Disease_" It is impossible to study the evidence for and against the so-called Christian Science cures without crossing the track of many an incapable doctor. Indeed, there can be no candid criticism of Christian Science methods that does not involve also an arraignment of existing medical methods. It is not difficult to perceive, as one studies the testimonies recorded in the _Christian Science Journal_, that many patients have been driven into Christian Science by a multitude of shifting and mistaken diagnoses, by the gross abuse of drugs, especially of morphine, and by the total neglect of rational psychotherapy on the part of many physicians. No doubt these causes account only for a certain fraction of the desertions to Christian Science. There are many patients who have so little patience and so much credulity that they desert their doctors for no good reason whatever; but I believe that these cases are in the minority, and that the success of the Christian Science movement is due largely to the ignorance and narrow-mindedness of a certain proportion of the medical profession.