Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Nor is it without good reason that arrangement is treated as the second of the five departments of oratory, [*](cp. vi. iv. 1. Invention, arrangement, style, memory, delivery. ) since without it the first is useless. For the fact that all the limbs of a statue have been cast does not make it a statue: they must be put together; and if you were to interchange some one portion of our bodies or of those of other animals with another, although the body would be in possession of all the same members
Nor can I regard as an error the assertion that order is essential to the existence of nature itself, for without order everything would go to wrack and ruin. Similarly if oratory lack this virtue, it cannot fail to be confused, but will be like a ship drifting without a helmsman, will lack cohesion, will fall into countless repetitions and omissions, and, like a traveller who has lost his way in unfamiliar country, will be guided solely by chance without fixed purpose or the least idea either of starting-point or goal.