Claim: Prohaeresius' influence was often described by famous sophists (teachers who taught virtue), but none of his written textbooks survive today.
Evidence: No textbooks written by Prohaeresius survive today, but his influence as a teacher is described by famous sophists and rhetoricians of the second half of the fourth century such as Himerius and Libanius. They taught arete – "virtue" or "excellence" – predominantly to young statesmen and nobility.