6.1
He continually urged those who were with him toward training, intensely so, using arguments of some such kind as these. Virtue, he said, is a science that is not only theoretical but also practical, just as medicine and music are. Therefore, just as the physician and the musician must each not only have grasped the principles of his own art but also have trained himself to act in accordance with those principles, so too the one who is to be a good man must not only thoroughly learn all the lessons that lead to virtue but also train himself in accordance with them, with dedication and love of labor. For how could anyone at once become self-controlled if he only knew that one must not be overcome by pleasures, yet remained untrained in resisting pleasures? How could anyone become just, having learned that one must love equality, but not having practiced avoiding grasping for more? How could we acquire courage, having understood that the things which seem terrible to most people are not to be feared, yet not having practiced being fearless in the face of them? How could we become wise, having recognized what things are truly good and bad, but not having trained ourselves to despise the things that merely seem good? Therefore training must in every case follow upon the learning of the lessons appropriate to each virtue, if indeed the learning itself is to be of any benefit to us. And the one who claims to pursue philosophy must train himself all the more than one who aspires to medicine, or to some similar art, insofar as philosophy is greater and harder to master than any other pursuit. For those who aspire to the other arts are not previously corrupted in their souls, nor have they learned things contrary to what they are about to learn; whereas those who undertake philosophy, having first come to be in great corruption and filled with vice, pursue virtue in such a condition that they need all the more training on that account.