"No Greek had the power of Cicero: because no Greek could impress on the abstract concepts of philosophy the impulse of action; No Greek could warm with the warmth of life the highest ideal of Hellenistic culture, that of humanitas (which was especially taught by the Hellenistic philosophers, Panaetius, Posidonius, etc.) and to transform it, as Cicero transformed it in Roman terms, into a principle operating on all peoples. A master of humanitas for his people, he became a teacher of the entire Western world, working through Christianity, the Middle Ages, and the Renaissance, uninterruptedly. (p. 138)"