Institutio Oratoria

There are, however, some who, while allowing the actual delivery of such specially brilliant forms of ornament, think that they should be excluded from the written speech. Consequently I must not dismiss even this topic without a word of discussion. For a number of learned authorities

have held that the written and the spoken speech stand on different footings, and that consequently some of the most eloquent of speakers have left nothing for posterity to read in durable literary form, as, for example, is the case with Pericles and Decades Again, they urge that there have been authors, like Isocrates, who, while admirable writers, were not well-fitted for actual speaking;