From Confessions XII.25:
But I will not tolerate their contention that Moses meant, not what I say he meant, but only what they say. It appals me, because even if their explanation is the right one, the arbitrary assurance with which they insist upon it springs from presumption, not from knowledge. It is the child of arrogance, not of true vision.
In other words: “You’re not wrong, you’re just an asshole.”
An und für sich 
Well done!
Unfortunately most of us don’t actually take assholishness seriously. Message over medium. Augustine is sincerely concerned with things like the show of rhetoric. We, however, will probably just chuckle at this entertaining summary and leave it at that…
Brilliant…