Concerning the Nature of Good, Against the Manichæans 2
2 How This May Suffice for Correcting the Manichæans PL 42, 552
But for the sake of those who, not being able to understand that all nature, that is, every spirit and every body, is naturally good, are moved by the iniquity of spirit and the mortality of body, and on this account endeavor to bring in another nature of wicked spirit and mortal body, which God did not make, we determine thus to bring to their understanding what we say can be brought. For they acknowledge that no good thing can exist save from the highest and true God, which also is true and suffices for correcting them, if they are willing to give heed.
Quomodo id possit ad corrigendos Manichaeos sufficere. Propter eos autem, qui cum intelligere non possunt omnem naturam, id est, omnem spiritum et omne corpus naturaliter bonum esse, moventur spiritus iniquitate et corporis mortalitate, et ob hoc aliam naturam maligni spiritus et mortalis corporis, quam Deus non fecerit, conantur inducere: sic arbitramur ad eorum intellectum, quod dicimus posse perduci. Fatentur enim omne bonum non esse posse, nisi a summo et vero Deo: quod et verum est, et ad eos corrigendos, si velint advertere, sufficit.