It took me a bit of sleuthing to uncover the meaning of the inscription in this painting behind Augustine and Monica. Partly because painters often abbreviate or stylize the Latin they quote and partly because I was unaware of the event in the life of Monica and Augustine the painting illustrates.
Anyone want a go before I reveal the answer in tomorrow's homily?
(Hint: At this point in his life, Augustine is shown reading the philosopher Aristotle, judging by the inscription on the book. Monica is obviously not happy with him.)