Preaching with One Idea

Rule 1: Tell them one thing, and one thing only
Though in the business of public speaking, Nick Morgan admits that the oral genre is highly inefficient:
We audience members simply don't remember much of what we hear. We're easily sidetracked, confused, and tricked. We get distracted by everything from the color of the presenter's tie to the person sitting in the next row to our own internal monologues.


So you've got to keep it simple. Many studies show that we only remember a small percentage of what we hear — somewhere between 10 – 30 percent.
Unfortunately, we can only hold 4 or 5 ideas in our heads at one time, so as soon as you give me a list of more than 5 items, I'm going to start forgetting as much as I hear.

Morgan's solution?

Against this dismal human truth there is only one defense: focus your presentation on a single idea. Be ruthless. Write that one idea down in one declarative sentence and paste it up on your computer. Then eliminate everything, no matter how beautiful a slide it's on, that doesn't support that idea.

John Stott argues for something similar to this in Between Two Worlds. He says the preacher should isolate the dominant thought of a passage and organize his whole sermon to support that one thought. Jay Adams has the same idea in Preaching with a purpose.