Here we must guard against the heresy of the Manichæans, who hold a certain original nature of evil, and a nation of darkness with princes at their head, whence the devil derives his existence. And thence they say our flesh is produced; and in this way interpret our Lord’s speech, Ye are of your father the devil: viz. to mean that they were by nature evil, drawing their origin from the opposite seed of darkness.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Tr. xlii. 10