And this is the substance of each thing (for this is the primary cause of its being); and since, while some things are not substances, as many as are substances are formed in accordance with a nature of their own and by a process of nature, their substance would seem to be this kind of 'nature', which is not an element but a principle.
Hau, banako bakoitzaren substantzia da (hau baita bere izatearen kausa lehena). Eta zenbait gauza substantziak ez direnez-substantzia guztiak naturaren arabera eta naturaz 30) osatzen baitira-, substantzia irudituko litzateke printzipio den natura hau, osagaia ez dena, alegia;