As one who has become known for extemporaneous preaching, I am often questioned about the value of memorizing sermons. My standard response is to discourage memorization. Preachers who memories and present written manuscripts, may appear to be more oral in their approach, but rarely get past the recitation of a product that has been derived from literate practices. In other words, it has been written and not spoken into existence. No amount of recitation can overcome its provenance in that regard. And all that is to say nothing of the perils of memorization itself, which in my experience, seldom goes well.
I prefer to assimilate my sermons to trying to memorize them, but that doesn’t mean there isn’t value in committing to memory some helpful trigger phrases or sentences in the sermon. I think of my sermon as a series of “moves” all of which require some level of transition or cuing in my consciousness. I have found it helpful to coin and deploy memorable phrases to help me move from one piece of the sermon to the next. Unlike theme statements, these trigger phrases do not require repetition. They do not even need to stick in the mind of the listener, but they do have to trigger in my mind the next piece that I intend to express.
Some such phrases I have used in recent sermons include…
…”well, I guess ‘that’s that”…
…”if I were writing the text, I would have done it differently…”
…”I would have liked to have seen Paul’s feet” (from Rom. 10:15)”…
…”it’s a matter of context, not content…”
Note that few, if any, of these carry much in the way of substance. The are, rather, hinge phrases that allow me to move from one piece to the next. Setting these markers in my memory allows me to give the sermon a sense of flow, ensuring that I get to the critical elements of the sermon, while remaining in oral mode thoughout.
Of course, any good extemporaneous preacher does this naturally. The rest of us, might find it helpful to be intentional about such things.