[53] For, as among physicians that which is called theoretical medical skill, is a long way from doing any good to those that are sick—for diseases are cured by medicines, and by operations, and by regimen, and not by discussions or theories; so also in philosophy, there is a set of word-traffickers and word-eaters, who have neither the will nor the skill to heal a life which is full of infirmities, but who, from their very earliest infancy to the extremity of old age, are not ashamed to cavil, and quibble, and wrangle about figurative expressions, as if happiness consisted in an interminable and profitless minuteness of accuracy in the matter of nouns and verbs, and not in the improving and ameliorating the moral character, the true fountain of the persons’ disposition; and in expelling the vices, and driving them out of its boundaries, and establishing the virtues as settlers within them.