Arius Didymus

Arius Didymus was a Greek philosopher and doxographer, usually described as a Stoic (or Stoic-leaning), active in the late first century BCE. He is generally identified with the Arius who served as court philosopher and adviser to the emperor Augustus. He is best known for an influential handbook summarizing the doctrines of the major philosophical schools (Stoic, Peripatetic, and Platonic ethics in particular), substantial portions of which survive through quotation in the anthology of Stobaeus. His epitomes are a valuable source for reconstructing Hellenistic ethical theory, especially Stoic and Aristotelian moral philosophy.