Dio of Prusa’s discourse 70, On Philosophy, is one of the most underrated texts in the history of philosophy. Dio, also known as “chrysostomos”, “with the golden mounth” (ca. 40-115 AD), was a traveling rhetorician, a type of sophist in the Roman first century, who could bring together thousands of listeners for his spectacle orations. Much like the sophists of classical Greece, Dio made a living out of his capacity to argue well, play with words and generate wonder through h