Institutio Oratoria

I shall frequently be compelled to speak of such virtues as courage, justice, self-control; in fact scarcely a case comes up in which some one of these virtues is not involved; every one of them requires illustration and consequently makes a demand on the imagination and eloquence of the pleader. I ask you then, can there be any doubt that, wherever imaginative power and amplitude of diction are required, the orator has a specially important part to play?