From "Dion," in The Age of Alexander by Plutarch, translated by Ian Scott-Kilvert

Directions
 

       At this encounter the general theme of the conversation was 

human virtue, and most of the discussion centered upon the topic of 

courage. Here Plato took the line that of all mankind the tyrant 

possesses the smallest share of this quality, and then turning to the 

subject of justice, he maintained that the life of the just is happy, while 

the life of the unjust is full of misery. Dionysius would not hear out this

argument, since it implied a direct reproach to himself, and he grew 

exasperated with the audience when he saw how much they admired

the speaker and were charmed by his doctrines. At last he lost his 

temper and angrily demanded of Plato why he had come to Sicily. 

Plato replied that he had come in search of a man of virtue; whereupon

Dionysius retorted, "Indeed! Then, by the gods, you do not seem to

have found one yet!"