Second: Physical health, as well as moral health, is of our own making. We are personally responsible not only for our own physical and mental health, but we are also morally responsible for the hereditary tendencies of our offspring toward health or disease.
Third: The attainment of physical health through compliance with Nature's laws is just as much a part of the Great Work as our ethical, moral and psychical development.
The Unity and Continuity of the Law
That which we call God, Nature, the Creator or the Universal Intelligence is the great central cause of all things and the vibratory activities produced by or proceeding from this central or primary cause continue through all spheres of life, in like manner as the light waves of the sun, moon and fixed stars penetrate through the intervening spheres of life to our plane of earth. Therefore all powers, forces, laws and principles which manifest on our plane proceed and continue from the innermost Divine to the most external plane in physical nature. This explains the continuity, stability and correspondence on all planes of being of that which we call Natural Law. In other words, "Natural Law is the established harmonic relationship of effects and phenomena to their causes and of all particular causes to the one great primary cause of all things."
Chapter XXXVIII
Mental Therapeutics
The new psychology and the science of mental and spiritual healing teach us that the lower principles in Man stand or should stand under the dominion of the higher. The physical body, with its material elements, is dominated and guided by the mind. The mind is inspired through the inner consciousness, which is an attribute of the soul. The soul of man is in communion with the Oversoul, which is the Source of all life and all intelligence animating the universe.
Wherever this natural order is reversed, there is discord or disease. Too many people think and act as though the physical body is all in all, as though it is the only thing worth caring for and thinking about. They exaggerate the importance of the physical and become its abject slaves.
The physical body is the lowest and least intelligent of the different principles making up the human entity. Yet people allow their minds and their souls to become dominated and terrified by the sensations of the physical body.
When the servants in the house control and terrify the master, when the master becomes their slave and they can do with him as they please, there cannot be order and harmony in that house.