"Excavations at Ai Khanoum on the northern border of modern Afghanistan have produced great quantities of Greek inscriptions and even the remnants of a philosophical treatise originally on papyrus. One of the most interesting is the base of a dedication by one Klearchos, perhaps the known student of Aristotle, that records his bringing to this new Greek city, Alexandria on the Oxus, the traditional maxims from the shrine of Apollo at Delphi concerning the five ages of man: In childhood, seemliness In youth, self-control In middle age, justice