Institutio Oratoria

But such rhetorical devices may be employed in connexion with matters about which there is no doubt or at least which we speak of as admitted facts. Nor would I deny that there is some advantage to be gained by pleasing our audience and a great deal by stirring their emotions. Still, all these devices are more effective, when the judge thanks he has gained a full knowledge of the facts of the case, which we can only give him by argument and by the employment of every other known means of proof.