Economists estimate that persuasion accounts for almost 40% of our efforts at work and is responsible for generating one-quarter or more of our total national income. We have evolved into an ideas economy where the bulk of our value and efforts revolve around our ability to build coalitions for action. Persuasion is no longer a “soft skill”, but one central to the future success of our ourselves, our teams and our organizations. So how do you get better at it?

More than 2,000 years ago Aristotle outlined a formula on how to master the art of persuasion in his work Rhetoric. Many great communicators have used it throughout the ages to deliver some of the most influential speeches, presentations, and share their ideas with the world.

To become a master of persuasion yourself and successfully sell your own ideas, try using these five rhetorical devices that Aristotle identified in your next speech or presentation:

1) Ethos or “Character”

Ethos represents the part of a speech or presentation when your audience gains some insight into your credibility. Aristotle believed that if a speaker’s actions didn’t back their words, they would lose credibility, and ultimately, weaken their argument.

2) Logos or “Reason”

Once ethos is established, it’s time to make a logical appeal to reason. Why should your audience care about your idea? If it will save your audience money, for example, they’ll want to know how much it will save them and how the savings will be accomplished. The same reasoning applies to making money. How will your idea help your listeners earn a profit? What steps do they have to take next?  These are all logical appeals that will help you gain support. Use data, evidence, and facts to form a rational argument.

3) Pathos or “Emotion”

According to Aristotle, persuasion cannot occur in the absence of emotion. People are moved to action by how a speaker makes them feel. Aristotle believed the best way to transfer emotion from one person to another is through the rhetorical device of storytelling. More than 2,000 years later, neuroscientists have found  his thesis accurate. Studies have found that narratives trigger a rush of neurochemicals in the brain, notably oxytocin, the “moral molecule” that connects people on a deeper, emotional level.

4) Metaphor 

Aristotle believed that metaphor gives language its verbal beauty. “To be a master of metaphor is the greatest thing by far,” he wrote. When you use a metaphor or analogy to compare a new idea to something that is familiar to your audience, it clarifies your idea by turning the abstract into something concrete.

Those who master the metaphor have the ability to turn words into images that help others gain a clearer understanding of  their ideas — but more importantly, remember and share them. It is a powerful tool to have.

5) Brevity

Here again, Aristotle was ahead of his time. “Aristotle had discovered that there are fairly universal limits to the amount of information which any human can absorb and retain,” writes Kings College professor Edith Hall in Aristotle’s Way. “When it comes to persuasion, less is always more.”

Brevity is a crucial element in making a persuasive speech. An argument, Aristotle said, should be expressed “as compactly and in as few words as possible.” He also observed that the opening of a person’s speech is the most important since “attention slackens everywhere else rather than at the beginning.” The lesson here is: start with your strongest point.

The good news for communicators is that Aristotle believed that persuasion can be learned. In fact, according to Hall, he was viewed as “quite threatening” to the political class in ancient Greece when he made the tools of rhetoric available to the masses. They wanted to keep the formula a closely held secret. But Aristotle wanted everyone to have access to it. He championed the idea that a person’s ability to speak and write well, and to use rhetorical devices to change another’s perspective, could unleash human potential and maximize happiness. While the tools we use to communicate ideas have changed in the past two thousand years, the human brain has not. The same formula that worked then will work now.