For we see these bodies produced from one another, which implies that the same body does not always remain fire or earth (we have spoken about this in our works on nature); and regarding the cause of movement and the question whether we must posit one or two, he must be thought to have spoken neither correctly nor altogether plausibly.
beraz, gorputzak berak ez du beti Sua eta Lurra izaten jarraitzen (hauei buruz Fisikari buruzko idatzietan hitz egin da). Eta 25) mugitzen diren gauzen kausari dagokionez, bat ezarri behar den ala bi, pentsatu behar da ez dela ez zuzena, ezta erabat egokia ere hitz egitea.