The Cato Maior is a popular essay in Ethics, applying the principles of philosophy to the alleviation of one of life's chief burdens, old age. In ancient times, when philosophy formed the real and only religion of the educated class, themes like this were deemed to afford a worthy employment for the pens even of the greatest philosophers. Such essays formed the only substitute the ancients had for our Sermons. There can be no doubt of Cicero's sincerity when he says that the arguments he sets forth in the treatise had given him real comfort,[22] and the opening words of the dedication show that he meant and hoped to administer the same comfort to his friend Atticus, who indeed acknowledged the benefit he derived from the work.[23] When Cicero wrote the treatise he was himself sixty-two years of age, while his friend was three years older. He speaks, therefore, rather euphemistically when he says that his purpose is to lighten the trouble of an old age which is already close at hand, or at all events approaching.[24] But in addition to the main ethical purpose, there was, as in many of Cicero's works, a distinct political purpose. He desired to stimulate in his readers an admiration for what he regarded as the golden age of Roman politics, the era of the Punic wars, and to do this by making the contrast between that age and his own appear as striking as possible. A like double purpose is apparent throughout the _De Re Publica_, where Africanus the younger is the chief personage, and in the treatise on Friendship, where Laelius is the central figure. For the dialogue on Old Age M. Porcius Cato the Censor is selected as the principal speaker for two reasons: first, because he was renowned for the vigor of mind and body he displayed in advanced life;[25] and secondly, because in him were conspicuously exhibited the serious simplicity, the unswerving adherence to principle, and the self-sacrificing patriotism which were the ideal Roman virtues, and which Cicero could not find among the politicians of his time. 4. _Form and Language._