Health. Â Is it not a splendid thing to be well and strong? To be full of bounding health? To feel one's life in every limb? Who does not desire to prolong, so far as possible, this condition characteristic of youth? Natural and Artificial Modes of Life. An animal living in a state of nature may keep well and live its natural period of life without knowing anything about the laws of health. But as students or indoor workers, many of us lead a sedentary life; we are not natural, but often highly artificial, in our mode of living. We move about but little, whereas the animal abounds in motion. We concentrate energy upon mental effort, thus diverting a large Share of our sum total of energy away from the pro cess of nutrition. We often Shut ourselves in rooms nearly air-tight. We eat poorly chosen and ill-prepared food. We devour it hastily, often when we are not in fit con dition to take food. In short, we frequently disobey the laws of Nature. Now, Nature punishes every violation of her laws. She never forgives, never forgets.