The Progression to Infinity

There would be a progression to infinity if there should be a mutation of mutation, and generation of generation. It is necessary therefore, that the former should be, if the latter will be. As that which is changed in quality is either body or soul, so that which is becoming to be is either motion or generation. But since motion neither belongs to substance or essence, nor to relation, nor to action and passion, it remains that it alone subsists according to quality, quantity, and situation.