[46] or in his having the skill of a flute player, if he does not play the flute? or of his knowing the harp, if he does not strike it? or, in short, what good is there in any artist whatever, if he does not exercise his art? for theoretical knowledge, without putting it in practise, is of no advantage whatever to those who possess it. For a man, though skilful in the contest of the pancratium, or in boxing, or in wrestling, would derive no advantage from his athletic prowess if his hands were tied behind him; and he who was thoroughly practised in running would derive no advantage from his fleetness of foot if he were afflicted with the gout, or if he were to meet with any other injury to his feet.