Of all the Ancient Greek philosophers, Plato was the one which had the most influence on subsequent ideas around the role of rhetoric and philosophy. A student of Socrates, he went on to found a school called The Academy, and was known for skepticism about the value of rhetoric.
This skepticism or mistrust of rhetoric likely had much to do with the circumstances surrounding the death of his mentor, Socrates, who was condemned to death by the Athenian court. Plato came to view rhetoric as merely a tool for manipulation. According to him, “Rhetoric is the art of ruling the minds of men.”
In this view, rhetoric was not concerned with truth but with persuasion. This was based on the idea that presentation and style mattered more than truth when it came to rhetoric. This put rhetoric is opposition to dialectic, which involved two parties presenting arguments in a discussion with the goal of determining the truth.
Plato was adamant about the opposition between rhetoric and dialectic, and that dialectic was a valuable practice which led to truth, while rhetoric was less honorable and concerned only with persuasion, often resulting in lies.
I’ve never agreed with his take on rhetoric, to be honest. From my understanding, rhetoric and dialectic are much more similar than Plato would admit. In a future post, I’ll get into more detail on the different ideas various philosophers had about the purpose of rhetoric and dialectic.
For now, I’ll say this about Plato: he had an idealistic viewpoint on what constituted truth, and believed that a rhetorician must first KNOW (philosophy) before he is to CONVINCE (rhetoric). Truth was determined through dialectic, or argumentation. Rhetoric was a tool to persuade or deceive, and therefore hardly worthy of the true philosopher.