Gaius Musonius Rufus was a Roman Stoic philosopher of the 1st century AD. He taught philosophy in Rome during the reign of Nero and so was sent into exile in 65 AD, returning to Rome only under Galba.
Chapter 1, page 1, of the works of Gaius Musonius Rufus, in Greek, edited by Otto Hense in the Teubner series, 1905.
Orations of Dio Chrysostom edited by Johann Jakob Reiske, 1784. Oration 1, ΠΕΡΙ ΒΑΣΙΛΕΙΑΣ (On Kingship)