Isocrates
Isocrates (436 - 338 BC), Greek rhetorician. Though he didn't speak himself, due to his weak voice and stage fright, he made many contributions to rhetoric and education in ancient Greece through his teaching and written works. Of the 60 orations in his name available in Roman times, 21 were transimitted by ancient and medieval scribes. Another three orations were found in a single codex during a 1988 excavation at Kellis, a site in the Dakhleh Oasis of Egypt. We have nine letters in his name, but the authenticity of four have been questioned.He was a fierce opponent of Plato. Among his students were Hypereides, Theopompus, and Ephorus.
