_If man will think only thoughts of perfect health, he can cause within himself the functioning of perfect health; all the Power of Life will be exerted to assist him. But this healthy functioning will not continue unless man performs the external, or voluntary, functions of living in a healthy manner._ _Man's first step must be to learn how to think perfect health; and his second step to learn how to eat, drink, breathe, and sleep in a perfectly healthy way. If man takes these two steps, he will certainly become well, and remain so._ CHAPTER III. LIFE AND ITS ORGANISMS. The human body is the abiding place of an energy which renews it when worn; which eliminates waste or poisonous matter, and which repairs the body when broken or injured. This energy we call life. Life is not generated or produced within the body; _it produces the body_. The seed which has been kept in the storehouse for years will grow when planted in the soil; it will produce a plant. But the life in the plant is not generated by its growing; it is the life which makes the plant grow. The performance of function does not cause life; it is life which causes function to be performed. Life is first; function afterward. It is life which distinguishes organic from inorganic matter, but it is not produced after the organization of matter. Life is the principle or force which causes organization; it builds organisms. It is a principle or force inherent in Original Substance; all life is One. This Life Principle of the All is the Principle of Health in man, and becomes constructively active whenever man thinks in a certain way. Whoever, therefore, thinks in this Certain Way will surely have perfect health if his external functioning is in conformity with his thought. But the external functioning must conform to the thought; man cannot hope to be well by thinking health, if he eats, drinks, breathes, and sleeps like a sick man. The universal Life Principle, then, is the Principle of Health in man. It is one with original substance. There is one Original Substance from which all things are made; this substance is alive, and its life is the Principle of Life of the universe. This Substance has created from itself all the forms of organic life by thinking them, or by thinking the motions and functions which produce them. Original Substance thinks only health, because It knows all truth; there is no truth which is not known in the Formless, which is All, and in all. It not only knows all truth, but it has all power; its vital power is the source of all the energy there is. A conscious life which knows all truth and which has all power cannot go wrong or perform function imperfectly; knowing all, it knows, too much to go wrong, and so the Formless cannot be diseased or think disease.