And since the source of all particularity is existence and...

And since the source of all particularity is existence and the particularity of a physical object is by means of its very essence, then all its essential concomitants and particularities have the existence of the physical object as their source. Thus the change of being in a certain place at a certain time necessitates a change of the existence of that physical object. Being is existence. Thus a change in being is a change of existence. A physical object always changes.

At every moment its existence is different from its existence prior to that moment. Movement and change are in its very existence and not in anything external to its existence. Movement is in the essence and substance of the physical object itself. This proves that every physical object has substantial motion.…