Institutio Oratoria

Marcus Cato was at once a great general, a philosopher, orator, historian, and an expert both in law and agriculture, and despite his military labours abroad and the distractions of political struggles at home, and despite the rudeness of the age in which he lived, he none the less learned Greek, when far advanced in years, that he might prove to mankind that even old men are capable of learning that on which they have set their hearts.