My clients often ask me what they should think about when they think about preparing a persuasive presentation. Should they write the script first? Create the images? Write an outline? Select a few key phrases and figures of speech? All of these are important elements of a persuasive presentation. But I usually tell them to think back 2,000 years to a Roman orator named Cicero.
Cicero was the best orator in the Roman forum. He could move audiences to tears or — more importantly — to action. He wrote down five rules for creating persuasive presentations in the first century BCE. Over time, these have become known as the five canons of rhetoric. They’re as relevant today as they were in ancient Rome.
For Cicero, the five canons are: 1) Invention; 2) Arrangement; 3) Style; 4) Memory; 5) Delivery. Let’s look briefly at each one.
Invention — Aristotle said that rhetoric is the ability to “see the available means of persuasion” in a given situation. Invention is about seeing all the ways you might persuade an audience and picking the best ones. First, you need to decide what you want the audience to do. You may simply want them to agree with you. Or take some specified action. Or buy your product. If your audience largely agrees with your message, you may select certain persuasive tactics. If your audience is largely hostile to your message, you’ll probably need other tactics. In today’s world, this is often known as creating the message strategy.
Arrangement — You’ve created your strategy, now you need to identify the elements of your argument and arrange them, in the best possible order. Let’s say you have three key points to make: A, B, and C. Your recognize that A is your strongest point, B is the second strongest, and C is the weakest. Knowing what you know about audiences, which order would you put them in? People often put them in descending order. But you’re typically better off putting them in A –> C –> B order. Why? Because audiences remember the beginning and end of your speech (primacy and latency) and forget the middle. You might as well put you weakest point in the middle — they’re going to forget it anyway. You also need to consider ethos, logos, and pathos. How you use these and when you use them depends on what you’re trying to achieve. You can learn more here.
Style — you’ve outlined your thoughts, now how do you want to sound? Do you want to sound like a college professor? A preacher? A business leader? A rabble-rousing politician? What does the audience expect? Which persona will be the most persuasive? This is about positioning yourself — the audience will ask, who is this person and why should I trust her? Once you decide the persona, you need to select the vocabulary. As you know, college professors use different words than rabble-rousing politicians. What words best fit your message strategy?
Memory — you probably have a big storehouse of knowledge. How easily can you access it? In my prepared remarks, I usually memorize certain keywords that trigger a chain of thoughts. Once I’m on the chain, it’s easy to follow. I appear to be in command of my material, which enhances my credibility. Memory is also important in the Q & A session. If you can answer questions easily, fluidly, and clearly, your credibility will soar. The trick is to know your way around the storehouse. The Greeks invented the memory palace to help orators remember and retrieve relevant information.
Delivery — You’ve now got it all organized. Can you deliver the goods when the time comes? Where style focuses mainly on what is said, delivery focuses more on how you say it. Do you want to speak quickly or slowly? Do you want to stand or sit? Podium or not? How will you dress? How do you want your voice to sound? How will you modulate your voice — or your body language — to emphasize key points? The goal is twofold: 1) to fit in with your audience (good decorum); 2) to appear comfortable and confident as you speak.
Using the five canons is like using a checklist. If you can fulfill each canon, you’re likely to have a very persuasive presentation indeed.