Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Again, is beauty an object of no consideration in the planting of fruit trees? Certainly not! For my trees must be planted in due order and at fixed intervals. What fairer sight is there than rows of trees planted in échelon [*](Quincunx. The formation may be thus represented ) which present straight lines to the eye from whatever angle they be viewed? But it has an additional advantage, since this form of plantation enables every tree to derive an equal share of moisture from the soil.
When the tops of my olive trees rise too high, I lop them away, with the result that their growth expands laterally
In fact true beauty and usefulness always go hand in hand. It does not, however, require any special ability to discern the truth of this. It is more important to note that such seemly ornament must be varied to suit the nature of the material to which it is applied. To begin with the primary classification of oratory, the same form of ornament will not suit demonstrative, deliberative and forensic speeches. For the oratory of display aims solely at delighting the audience, and therefore develops all the resources of eloquence and deploys all its ornament, since it seeks not to steal its way into the mind nor to wrest the victory from its opponent, but aims solely at honour and glory.
Consequently the orator, like the hawker who displays his wares, will set forth before his audience for their inspection, nay, almost for their handling, all his most attractive reflexions, all the brilliance that language and the charm that figures can supply, together with all the magnificence of metaphor and the elaborate art of composition that is at his disposal. For his success concerns himself, and not his cause.