This is true of the voluntary and involuntary functions. Functions performed normally, with normal force, produce activity known as health. Functions performed with more or less force than those indicating health is disease. Either of these conditions is life, one of health and the other of disease. Pathology is modified physiology.
Pathological operations are physiological acts modified.
Processes which are pathological are but modified functional movements. Physiological impulses may become pathological in their expression. These two classes of impulses, destined for different portions of the body, over entirely different divisions of nerves, the one involuntary, the other voluntary, the former devoted to organic life, the latter to animal, ought not be thrown into one indiscriminate lot, as Innate mental impulses. That Frenchman threw in a question a few evenings ago by saying, although the lady with the head of beautiful flowing hair has a good flow of language, yet there is nothing about her hair that is characteristic of a fluid. I was referring to physical science, natural philosophy, which deals with the material world.