But so far as the study of language, of artistic diction, of elocution, and intelligent reading could help a boy to prepare himself for life, this education was good; more especially good as laying a foundation for the acquirement of that art of oratory which, from old Cato's time onwards, had been the chief end to be aimed at by all intending to take part in public life. Cato indeed had well said to his son, "Orator est, Marce fili, vir bonus dicendi peritus,"[290] thus putting the ethical stamp of the man in the first place; and his "rem tene, verba sequentur" is a valuable bit of advice for all learners and teachers of literature. But more and more the end of all education had come to be the art of oratory, and particularly the art as exercised in the courts of law, where in Cicero's time neither truth nor fact was supreme, and where the first thing required was to be a clever speaker,--a vir bonus by all means if you were so disposed. But to this we shall return directly. In such schools, if he were not educated at home, the boy remained till he was invested with the toga virilis, or pura. In the late Republic this usually took place between the fourteenth and seventeenth years;[291] thus the two young Ciceros seem both to have been sixteen when they received the toga virilis, while Octavian and Virgil were just fifteen, and the son of Antony only fourteen. In former times it seems probable that the boy remained "praetextatus" till he was seventeen, the age at which he was legally capable of military service, and that he went straight from the home to the levy;[292] in case of severe military pressure, or if he wished it himself, he might begin his first military exercises and even his active service, in the praetexta. But as in so many other ways, so here the life of the city brought about a change; in a city boys are apt to develop more rapidly in intelligence if not in body, and as the toga virilis was the mark of legal qualification as a man, they might be of more use to the family in the absence of the father if invested with it somewhat earlier than had been the primitive custom. But there was no hard and fast rule; boys develop with much variation both mentally and physically, and, like the Eton collar of our own schoolboys, the toga of childhood might be retained or dropped entirely at the discretion of the parents.