Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Some arguments will even wear a certain semblance of defence: for example, if the orator is speaking in praise of Hercules, he will find excuses for his hero having changed raiment with the Queen of Lydia and submitted to the tasks which legend tells us she imposed upon him. The proper function however of panegyric is to amplify and embellish its themes. This form of oratory is directed in the main to the praise of gods and men, but may occasionally be applied to the praise of animals or even of inanimate objects.
In praising the gods our first step will be to express our veneration of the majesty of their nature in general terms. next we shall proceed to praise the special power of the individual god and the discoveries whereby he has benefited the human race.
For example, in the case of Jupiter, we shall extol his power as manifested in the governance of all things, with Mars we shall praise his power in war, with Neptune his power over the sea; as regards inventions we shall celebrate Minerva's discovery of the arts, Mercury's discovery of letters, Apollo's of medicine, Ceres' of the fruits of the earth, Bacchus'
Some again may be praised because they were born immortal, others because they won immortality by their valour, a theme which the piety of our sovereign has made the glory even of these present times. [*](sc. by Donitian's deification of his father Vespasian and his brother Titus. )