This section is from the "Nature Cure: Philosophy and Practice Based on the Unity of Disease and Cure" book, by Henry Lindlahr.
The freer the inflow of life force into the organism, the greater the vitality, the more there is of strength, of positive resisting and recuperating power.
In the book Harmonics of Evolution we are told that at the very foundation of the manifestation of life lies the principle of polarity, which expresses itself in the duality and unity of positive and negative affinity. The swaying to and fro of the positive and the negative, the desire to balance incomplete polarity, constitutes the very ebb and flow of life.
Disease is disturbed polarity. Exaggerated positive or negative conditions, whether physical, mental, moral or spiritual, tend to disease on the respective planes of being. Foods, medicines, suggestion and all the other different methods of therapeutic treatment exert on the individual subjected to them either a positive or a negative influence. It is, therefore, of the greatest importance that the physician and every one who wishes to live and work in harmony with Nature's Laws should understand this all-important question of magnetic polarity.
Lowered vitality means lowered, slower and coarser vibration, and this results in lowered resistance to the accumulation of morbid matter, poisons, disease taints, germs and parasites. This is what we designate ordinarily as the negative condition.
Let us see whether we can explain this more fully by a homely but practical illustration: A great many of my readers have probably seen in operation in the summer amusement parks the "human roulette." This contrivance consists of a large wheel, board-covered, somewhat raised in the center, and sloping towards the circumference. The wheel rotates horizontally, evenly with the floor or ground. The merrymakers pay their nickels for the privilege of throwing themselves flat down on the wheel and attempting to cling to it while it rotates with increasing swiftness. While the wheel moves slowly, it is easy enough to cling to it; but the faster it revolves, the more strongly the centrifugal force tends to throw off the human flies who try to stick to it.
The increasing repelling power of the accelerated motion of the wheel may serve as an illustration of that which we call vigorous vibration, good vitality, natural immunity or recuperative power. This is the positive condition.
The more intense the action of the life force, the more rapid and vigorous are the vibratory activities of the atoms and molecules in the cells, and of the cells in the organs and tissues of the body. The more rapid and vigorous this vibratory activity, the more powerful is the repulsion and expulsion of morbid matter, poisons and germs of disease which try to encumber or destroy the organism.