Book 6
3.106
But if we accept these definitions, we shall have to allow the title of urbane to anything that is well said. It was natural therefore that the author of this definition should classify such sayings under three heads, serious, humorous and intermediate, since all good sayings may be thus classified. But, in my opinion, there are certain forms of humorous saying that may be regarded as not possessing sufficient urbanity.
3.107
For to my thinking urbanity involves the total absence of all that is incongruous, coarse, unpolished and exotic whether in thought, language, voice or gesture, and resides not so much in isolated sayings as in the whole complexion of our language, just as for the Greeks Atticism means that elegance of taste which was peculiar to Athens.
3.108
However, out of respect to the judgment of Marsus, who was a man of the greatest learning, I will add that he divides serious utterances into three classes, the honorific, the derogatory and the intermediate. As an example of the honorific he quotes the words uttered by Cicero in the pro Ligario xii. 35. with reference to Caesar, You who forget nothing save injuries.