Simplicius on Physics #11: On Book 5

From p. 111 of J. O. Urmson's translation of Simplicius On Aristotle On Physics 5:

“[F]orced ceasing to be is contrary to natural ceasing to be. but in the case of ceasing to be, force is clear; but also there are cases of coming to be which are forced and do not occur according to the laws of nature, which he called ‘not fated’, when some things give birth before a ripe age. The commentators take this as a sign that the Peripatetics assign the fated to the natural, since he called changes that were forced and unnatural ‘not fated’. He also says that some cases of growth are unnatural, like the speedy maturing of those on rich foods who might beget also unnaturally and forcibly, and crops that take quickly through heat and grow in the so-called gardens of Adonis before taking root and being planted the soil. And in the case of alteration both the natural and the unnatural are found. For those who recover from sickness in the critical days are altered naturally and securely, those who do not do so unnaturally and insecurely.”