"In order to obtain the best results physically, the individual must live according to the simple laws of nature. Plenty of good healthful exercise must be taken regularly and without strain. The intelligent direction of the mind must also be brought into action with all muscular efforts. Man's daily employment should be a mixture of both mental and physical labor, for all brain work strains the mind and weakens the flesh, while all bodily exertion over-taxes the frame and retards the growth of intellect. Deep breathing, an abundance of pure fresh air and plenty of sunlight are indispensable to perfect health. Daily baths are essential to keep the exterior of the body clean, while the interior must be kept in good order with a moderate supply of simple, wholesome and unadulterated foods. Nature's plain beverage, water, is all that man should imbibe. No evil thoughts must be allowed to enter the mind. Cheerfulness, self-control, kindliness and optimism are great aids in promoting health. Pessimism, worry, anger, fear and violent emotions are poison to the system. There should be nothing in life to fear. The unselfish know no fear. Those who teach it, or cause others to fear are common enemies to health and progress. "The beastly custom of drinking intoxicating liquors, now prevalent throughout the world, is one of the very worst forms of robbing the individual of his physical strength and vitality, as well as his reason and moral character. "The tobacco habit also; that idiotic and ridiculous performance of filling the mouth with smoke merely to blow it out again, is another dangerous obstacle thrown in the path of good health. It seems strange that the Apeman cannot open his eyes wide enough to see the danger as well as the absurdity of these silly customs which sap his strength and leave him in a state of abject weakness. What a pity he cannot exert enough will power to overcome these stupid and harmful practices. "If you want to use your faculties when you are old, exercise them properly when you are young. Improve yourself and you make better the world." CHAPTER XX "Sageland, previous to the catastrophe," resumed Arletta, "was a small oblong continent surrounded by what are now known as the Indian and South Atlantic Oceans. It ran from north-east to southwest. Its extreme length was nine hundred and twenty-eight miles and its greatest width was three hundred and ninety-six miles. There were a little over thirty million inhabitants in the land. "Unlike the different countries of the present time, there were no large cities in Sageland. The population was scattered over the entire surface of the country at intervals and was domiciled in two distinct ways, namely: the rural form of dwelling, in which a single family occupied a separate house for its own private use, and the borough settlements, whereby several thousand persons lived together under one roof.