218. That these ascending and descending degrees, which are also called prior and posterior, and likewise degrees of height or discrete degrees are in their power in their ultimate, can be confirmed by all those things which have been adduced in the preceding sections as confirmations from things of sense and perception. Here, however. I wish to confirm them only by the conatus, forces and motions in dead and in living subjects. It is known that conatus does nothing from itself but acts through forces corresponding to itself, and through these produces motion; consequently that conatus is the everything in forces, and through forces, the everything in motion; and because motion is the ultimate degree of conatus, through motion conatus exerts its power. Conatus, force and motion are not otherwise conjoined except according to degrees of height, the conjunction of which is not by continuity, for they are discrete, but by correspondences. For conatus is not force, nor is force motion. But force is produced by conatus, because force is conatus In action, and through force motion is produced. Wherefore there is no power in conatus alone, nor in force alone, but there is power in motion which is their product. That such is the case may still appear doubtful because not illustrated by applications to sensible and perceptible things in nature; nevertheless, such is the progression of conatus, force and motion into power.