Says a noted American author, an able graduate of one of our greatest medical schools, and one who has studied deeply into the forces that build the body and the forces that tear it down: "The mind is the natural protector of the body. . . . Every thought tends to reproduce itself, and ghastly mental pictures of disease, sensuality, and vice of all sorts, produce scrofula and leprosy in the soul, which reproduces them in the body. Anger changes the chemical properties of the saliva to a poison dangerous to life. It is well known that sudden and violent emotions have not only weakened the heart in a few hours, but have caused death and insanity. It has been discovered by scientists that there is a chemical difference between that sudden cold exudation of a person under a deep sense of guilt and the ordinary perspiration; and the state of the mind can sometimes be determined by chemical analysis of the perspiration of a criminal, which, when brought into contact with selenic acid, produces a distinctive pink color. It is well known that fear has killed thousands of victims; while, on the other hand, _courage is a great invigorator_. "Anger in the mother may poison a nursing child. Rarey, the celebrated horse-tamer, said that an angry word would sometimes raise the pulse of a horse ten beats in a minute. If this is true of a beast, what can we say of its power upon human beings, especially upon a child? Strong mental emotion often causes vomiting. Extreme anger or fright may produce jaundice. A violent paroxysm of rage has caused apoplexy and death. Indeed, in more than one instance, a single night of mental agony has wrecked a life. Grief, long-standing jealousy, constant care and corroding anxiety sometimes tend to develop insanity. Sick thoughts and discordant moods are the natural atmosphere of disease, and crime is engendered and thrives in the miasma of the mind." From all this we get the great fact we are scientifically demonstrating today,--that the various mental states, emotions, and passions have their various peculiar effects upon the body, and each induces in turn, if indulged in to any great extent, its own peculiar forms of disease, and these in time become chronic.