It is perfectly certain that all diseases without exception are preventible, or if not so that they can be so weakened as to do no harm. It is perfectly certain that all accidents are preventible; there is not one that does not arise from folly or. negligence. All accidents are crimes. It is perfectly certain that all human beings are capable of physical happiness. It is absolutely incontrovertible that the ideal shape of the human being is attainable to the exclusion of deformities. It is incontrovertible that there is no necessity for any man to die but of old age, and that if death cannot be prevented life can be prolonged far beyond the farthest now known. It is incontrovertible that at the present time no one ever dies of old age. Not one single person ever dies of old age, or of natural causes, for there is no such thing as a natural cause of death. They die of disease or weakness which is the result of disease, either in themselves or in their ancestors. No such thing as old age is known to us. We do not even know what old age would be like, because no one ever lives to it.
— RICHARD JEFFERIES