That, with faith and gratitude, and the purpose to really live, covers all the requirements. It is not necessary to take mental exercises of any kind, except as described in Chapter VI, or to do wearying "stunts" in the way of affirmations, and so on. It is not necessary to concentrate the mind on the affected parts; it is far better not to think of any part as affected. It is not necessary to "treat" yourself by auto-suggestion, or to have others treat you in any way whatever. The power that heals is the Principle of Health within you; and to call this Principle into Constructive Action it is only necessary, having harmonized yourself with the All-Mind, to claim by FAITH the All-Health; and to hold that claim until it is physically manifested in all the functions of your body. In order to hold this mental attitude of faith, gratitude, and health, however, your external acts must be only those of health. You cannot long hold the internal attitude of a well person if you continue to perform the external acts of a sick person. It is essential not only that your every thought should be a thought of health, but that your every act should be an act of health, performed in a healthy manner. If you will make every thought a thought of health, and every conscious act an act of health, it must infallibly follow that every internal and unconscious function shall come to be healthy; for all the power of life is being continually exerted toward health. We shall next consider how you may make every act an act of health. CHAPTER IX. WHEN TO EAT. You cannot build and maintain a perfectly healthy body by mental action alone, or by the performance of the unconscious or involuntary functions alone. There are certain actions, more or less voluntary, which have a direct and immediate relation with the continuance of life itself; these are eating, drinking, breathing, and sleeping. No matter what man's thought or mental attitude may be, he cannot live unless he eats, drinks, breathes, and sleeps; and, moreover, he cannot be well if he eats, drinks, breathes, and sleeps in an unnatural or wrong manner. It is therefore vitally important that you should learn the right way to perform these voluntary functions, and I shall proceed to show you this way, beginning with the matter of eating, which is most important. There has been a vast amount of controversy as to when to eat, what to eat, how to eat, and how much to eat; and all this controversy is unnecessary, for the Right Way is very easy to find. You have only to consider the Law which governs all attainment, whether of health, wealth, power, or happiness; and that law is _that you must do what you can do now, where you are now; do every separate act in the most perfect manner possible, and put the power of faith into every action_.