In the choice of his words, too, the author of the projected poem must be delicate and cautious, he must embrace one and reject another: you will express yourself eminently well, if a dexterous combination should give an air of novelty to a well-known word. If it happen to be necessary to explain some abstruse subjects by new invented terms; it will follow that you must frame words never heard of by the old-fashioned Cethegi: and the license will be granted, if modestly used: and the new and lately-formed words will have authority, if they descend from a Greek source, with a slight deviation. But why should the Romans grant to Plutus and Caecilius a privilege denied to Virgil and Varius? Why should I be envied, if I have it in my power to acquire a few words, when the language of Cato and Ennius has enriched our native tongue, and produced new names of things? It has been, and ever will be, allowable to coin a word marked with the stamp in present request. As leaves in the woods are changed with the fleeting years; the earliest fall off first: in this manner words perish with old age, and those lately invented nourish and thrive, like men in the time of youth. We, and our works, are doomed to death: Whether Neptune, admitted into the continent, defends our fleet from the north winds, a kingly work; or the lake, for a long time unfertile and fit for oars, now maintains its neighboring cities and feels the heavy plow; or the river, taught to run in a more convenient channel, has changed its course which was so destructive to the fruits. Mortal works must perish: much less can the honor and elegance of language be long-lived. Many words shall revive, which now have fallen off; and many which are now in esteem shall fall off, if it be the will of custom, in whose power is the decision and right and standard of language.
Homer has instructed us in what measure the achievements of kings, and chiefs, and direful war might be written.
Plaintive strains originally were appropriated to the unequal numbers [of the elegiac]: afterward [love and] successful desires were included. Yet what author first published humble elegies, the critics dispute, and the controversy still waits the determination of a judge.
Rage armed Archilochus with the iambic of his own invention. The sock and the majestic buskin assumed this measure as adapted for dialogue, and to silence the noise of the populace, and calculated for action.
To celebrate gods, and the sons of gods, and the victorious wrestler, and the steed foremost in the race, and the inclination of youths, and the free joys of wine, the muse has alotted to the lyre.
If I am incapable and unskilful to observe the distinction described, and the complexions of works [of genius], why am I accosted by the name of "Poet?" Why, out of false modesty, do I prefer being ignorant to being learned?
A comic subject will not be handled in tragic verse: in like manner the banquet of Thyestes will not bear to be held in familiar verses, and such as almost suit the sock. Let each peculiar species [of writing] fill with decorum its proper place. Nevertheless sometimes even comedy exalts her voice, and passionate Chremes rails in a tumid strain: and a tragic writer generally expresses grief in a prosaic style. Telephus and Peleus, when they are both in poverty and exile, throw aside their rants and gigantic expressions if they have a mind to move the heart of the spectator with their complaint.
It is not enough that poems be beautiful; let them be tender and affecting, and bear away the soul of the auditor whithersoever they please. As the human countenance smiles on those that smile, so does it sympathize with those that weep. If you would have me weep you must first express the passion of grief yourself; then, Telephus or Peleus, your misfortunes hurt me: if you pronounce the parts assigned you ill, I shall either fall asleep or laugh.
Pathetic accents suit a melancholy countenance; words full of menace, an angry one; wanton expressions, a sportive look; and serious matter, an austere one. For nature forms us first within to every modification of circumstances; she delights or impels us to anger, or depresses us to the earth and afflicts us with heavy sorrow: then expresses those emotions of the mind by the tongue, its interpreter. If the words be discordant to the station of the speaker, the Roman knights and plebians will raise an immoderate laugh. It will make a wide difference, whether it be Davus that speaks, or a hero; a man well-stricken in years, or a hot young fellow in his bloom; and a matron of distinction, or an officious nurse; a roaming merchant, or the cultivator of a verdant little farm; a Colchian, or an Assyrian; one educated at Thebes, or one at Argos.
You, that write, either follow tradition, or invent such fables as are congruous to themselves. If as poet you have to represent the renowned Achilles; let him be indefatigable, wrathful, inexorable, courageous, let him deny that laws were made for him, let him arrogate every thing to force of arms. Let Medea be fierce and untractable, Ino an object of pity, Ixion perfidious, Io wandering, Orestes in distress.