The matter of drinking in a natural way may be dismissed here with a very few words. If you wish to be exactly and rigidly scientific, drink nothing but water; drink only when you are thirsty; drink whenever you are thirsty, and stop as soon as you feel that your thirst begins to abate. But if you are living rightly in regard to eating, it will not be necessary to practice asceticism or great self-denial in the matter of drinking. You can take an occasional cup of weak coffee without harm; you can, to a reasonable extent, follow the customs of those around you. Do not get the soda fountain habit; do not drink merely to tickle your palate with sweet liquids; be sure that you take a drink of water whenever you feel thirst. Never be too lazy, too indifferent, or too busy to get a drink of water when you feel the least thirst; if you obey this rule, you will have little inclination to take strange and unnatural drinks. Drink only to satisfy thirst; drink whenever you feel thirst; and stop drinking as soon as you feel thirst abating. That is the perfectly healthy way to supply the body with the necessary fluid material for its internal processes. CHAPTER XIII. IN A NUTSHELL. There is a Cosmic Life which permeates, penetrates, and fills the interspaces of the universe, being in and through all things. This Life is not merely a vibration, or form of energy; it is a Living Substance. All things are made from it; it is All, and in all. This Substance thinks, and it assumes the form of that which it thinks about. The thought of a form, in this substance, creates the form; the thought of a motion institutes the motion. The visible universe, with all its forms and motions, exists because it is in the thought of Original Substance. Man is a form of Original Substance, and can think original thoughts; and within himself, man's thoughts have controlling or formative power. The thought of a condition produces that condition; the thought of a motion institutes that motion. So long as man thinks of the conditions and motions of disease, so long will the conditions and motions of disease exist within him. If man will think only of perfect health, the Principle of Health within him will maintain normal conditions. To be well, man must form a conception of perfect health, and hold thoughts harmonious with that conception as regards himself and all things. He must think only of healthy conditions and functioning; he must not permit a thought of unhealthy or abnormal conditions or functioning to find lodgment in his mind at any time.