“The perfectly natural performance of function constitutes health; and the perfectly natural performance of function results from the natural action of the Principle of Life. There is a Principle of Life in the universe; it is the One Living Substance from which all things are made. This Living Substance permeates, penetrates, and fills the interspaces of the universe; it is in and through all things, like a very refined and diffusible ether. All life comes from it; its life is all the life there is.
Man is a form of this Living Substance, and has within him a Principle of Health. (The word Principle is used as meaning source). The Principle of Health in man, when in full constructive activity, causes all the voluntary functions of his life to be perfectly performed.”
Wallace D. Wattles