For God not to know is for Him to reject, as also a man who speaks the truth is said not to know how to lie, for he disdains to sin by telling a lie, not that if he wished to lie he knew not how, but that from love of truth he scorns to speak what is false. Therefore the light of truth knows not the darkness which it condemns. It follows, Then shall ye begin to say, We have eaten and drunk in thy presence, &c.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Moral. 2. c. 5.