My sister, on being taken ill, had been removed to the house of her mother, in the hope that a change of air might do something for her; but all in vain. My mother and a few other friends who were with them as assistants sickened, but they all ultimately recovered. They, however, took no medicine by way of prevention. Now I do not presume to say, that my young friends were destroyed solely by medicine, for the assertion would be unwarranted. I only state the facts, and tell you what my convictions then were, and what they are still. My belief is, that though they might have sickened had they taken no medicine or preventive, yet their chance of recovery after they sickened was very much diminished by the unnecessary and uncalled-for dosing and drugging. The notion that we can physick off the seeds of disease, or by our dosing prevent their germination, is as erroneous as can possibly be, and is a prolific source of much suffering and frequent death. The best preventive of disease is good health. Now, physicking off generally weakens us, instead of giving strength. It takes away from our good health instead of adding to or increasing it. As a general rule, to which there are very few exceptions, all medicine, when disease is unusually common or fatal, is hazardous without sound medical advice, and not generally safe even then. It is fit only for extreme cases. You may be at a loss to understand how such facts and reflections as these could allure me to the study and practice of medicine as a profession. Yet they most certainly had influence. Not that I felt a very strong desire to deal out medicine, for to this I felt a repugnance which strengthened with increase of years and experience. What I most ardently desired was to know the causes of disease, and how far they were or were not within human control. Such a science as that of _hygiene_--nay, even the word itself, and the phrase _laws of health_--was at that time wholly unknown in the world in which I moved. There was, in truth, no way then to this species of knowledge, except through the avenues opened by a course of medical study. Hence it was that I blundered on, in partial though not entire ignorance, for some time longer, groping and searching for that light which I hardly knew how or whence to seek, except in pills and powders and blisters and tinctures. CHAPTER XII. MANUFACTURING CHILBLAINS. At the period of my life to which we have at length arrived, I was for four or five months of every year a school teacher. This was, in no trifling degree, an educational process; for is it not well known that, "Teaching we learn, and giving we retain?" It was at least an education in the great school of human nature.