About the art of oratory

[S]ince all the activity and ability of an orator falls into five divisions, ... he must first hit upon what to say; then manage and marshal his discoveries, not merely in orderly fashion, but with a discriminating eye for the exact weight as it were of each argument; next go on to array them in the adornments of style; after that keep them guarded in his memory; and in the end deliver them with effect and charm. (De oratore, I.xxxi).

- Cicero.