When our bodies are invaded by malevolent microbes, the defensive corpuscles within us, if in fit condition, destroy them. But if not fed with those elements which are needful for their sustenance, they soon "run down"--just as we ourselves get "below par." We are then liable to become the prey of those ceaseless microscopic enemies that are ever ready to pounce upon the unfit. If our corpuscles are weaker than the invading foes, no drugs can save us--we are doomed. Hence the importance of keeping ourselves and our nerve centres well charged and in vigorous condition. [Sidenote: =How to Accumulate Vitality.=] To accumulate vitality our food must contain all the chemical elements which we need. None must be permanently omitted. If, for instance, we entirely exclude organic phosphorus from the food of a man of great intellect, he will, in due time, be reduced to imbecility. This is obtained in such foods as cheese, milk, wholemeal bread, peas, apples, strawberries, and bananas. We must live by _method_, and take some trouble. Nature's greatest gift is not to be obtained without thought or effort. We must eat, breathe, and live wisely; and the closer to Nature we get, the better it will be for us. The habit of deep breathing, like that of living much in the open air, yields important results. The atmosphere consists of oxygen and nitrogen--the very elements of which our bodies are chiefly constructed. Life and vigour _can be inhaled_, but few persons have learnt the art. Cheerfulness tends to promote the assimilation of food. Exercise--of an intelligent and healthful sort--is needful to make the life-current pulsate through our tissues. Without it our organs do not get properly nourished and rebuilt: stiffness and atrophy set in. Worry and care must be banished, and unwise or excessive expenditure of nerve force avoided; for these things deplete the human storage battery of its vitality. Mankind is slowly gaining greater knowledge of vital, mental, and spiritual truth. Ultimately, "Life more abundant" will become the heritage of the many instead of the few. Self-emancipation from weakness and disability is an achievement that will repay much effort on the part of each one of us; and we can all render beneficent social service by exemplifying the art of living wisely. By promoting hygienic and humane education, we can prevent much suffering, and greatly increase the sum of happiness in this world! [Illustration: =Finis=] All readers who feel that they have derived helpful and useful knowledge by reading this book, are respectfully invited to make it known to their friends and neighbours, or to present copies to them. All financial profit arising from its sale is devoted to the philanthropic work of The Order of the Golden Age and the exaltation of its hygienic and humane Ideals.