Exercise makes the body strong. Many a man has reason to bless the memory of his father or teacher, who, when he was a weak boy, with flabby muscles, and without energy or strength of will, made him take regular exercise. A young man who was threatened by weak lungs was ordered to take regular Exercise every day with clubs and dumb-bells and a vigorous walk in the open air. After a few months' steady practice he found that he could, with his hands, lift his elder brother, lying flat on the ground, by the clothes and elevate him above his own head. Neglect of Exercise keeps the muscles weak, makes the blood impure, and renders the body liable to the diseases which are ever ready to attack him. We now know that diseases enter the human body by means of minute living germs, which float unseen in the atmosphere. Practically, no people living in towns escape these germs; but the strong body is able to throw them off, while the weak succumbs. There are in the blood thousands of little bodies which act as scavengers, and are continually fighting against foreign invaders that get into the system. If the body becomes weak through lack of Exercise, the blood suffers, the number of scavengers becomes lessened, and disease more easily fastens upon it. Not only is the body weakened by lack of Exercise, but the brain is even more so. If a stream of pure blood be necessary for the strength of the body, it is far more necessary for the health of the brain. Parents often complain that their sons are stupid, and are not able to see through things, and have poor memories, when the trouble lies chiefly in the fact that the blood is unable to carry off the worn-out elements of the brain, because it is not kept pure by regular Exercise and fresh air. The secret of mental activity is complete bodily health. The boy who is subject to headaches cannot study hard; nine-tenths of the headaches arise from giving the stomach too much hard work, and the brain too little. The stomach is capable of an immense amount of labour if the other members of the body will only work, too; but if they get idle, it is apt to break down under its burdens, and then the brain suffers. The English race has always been characterized by immense energy. Probably no other race has ever been so distinguished for enterprise and energy. It is the energy of the race which has led to the growth of its vast colonies, and to the maintenance of empire over less civilized peoples. It has made the United States the great nation that it is. Energy makes the man, as it makes the nation. The vast majority of people depend for energy upon Exercise. Loafing destroys energy. Mental energy depends very largely upon physical energy, except in the case of the sick. Physical energy depends upon taut muscles and supple joints.