What is disease? It is what follows the effect of a false direction given to the mind or spiritual matter. The body is composed of matter, not mind, but when agitated, that part which is called heat and is thrown off is mind or spirit. It is not intelligence but a medium to be used according to the direction given it by a power independent of itself, like that direction given to mechanical power. The effect of this direction, call it what you please, on the body, is to destroy itself, for its life is its own destruction.