He was a friend of Lucullus (the antagonist of Mithridates) and the teacher of Cicero during his studies at Athens in 79 BC; but he had a school at Alexandria also, as well as in Syria, where he seems to have died.
Han var vän till Lucullus (Mithridates motståndare) och lärare till Cicero under dennes studier i Aten (79 f.Kr.), men han hade också en skola i Alexandria, liksom i Syrien där han förefaller att ha dött.