(motion) relative to that which persists in space (e.g., the motion of the sun with regard to the objects on the earth); we do not even have any thing persistent on which we could base the concept of a substance, as intuition, except merely matter, and even this persistence is not drawn from outer experience, but rather presupposed a priori as the necessary condition of all time determination, thus also as the determination of inner sense in regard to our own existence through the existenceC of outer things.