Motion Is Contrary to Motion

Motion from a contrary to a contrary is contrary to that which is from a Contrary to a contrary. This being the case the motion which is from health to disease is contrary to the motion from disease to health. The tendency which is to a contrary alone is not motion but mutation such for instance as becoming to be white but not from a certain thing. But it is manifest from induction what kind of things those appear to be which are contourities, and these can only be deduced by science.