Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
So too building should not be styled an art; for primitive man built himself a hut without the assistance of art. Music by the same reasoning is not an art; for every race indulges in some kind of singing and dancing. If therefore any kind of speech is to be called eloquence, I will admit that it existed before it was an art.
If on the other hand not every man that speaks is an orator and primitive man did not speak like an orator, my opponents must needs acknowledge that oratory is the product of art and did not exist before it. This conclusion also rules out their argument that men speak who have never learnt how to speak, and that which a man does untaught can have no connexion with art.