Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
When, however, we are speaking of our own affairs or those of others, we must distinguish between the expedient and the becoming, while recognising that the majority of the points which we have to consider will fall under neither head. In the first place, then, all kinds of boasting are a mistake, above all, it is an error for an orator to praise his own eloquence, and, further, not merely wearies, but in the majority of cases disgusts the audience.
For there is ever in the mind of man a certain element of lofty and unbending pride that will not brook superiority: and for this reason we take delight in raising the humble and submissive to their feet, since such an act gives us a consciousness of our
As a result, those who are beneath him feel a grudge against him (for those who are unwilling to yield and yet have not the strength to hold their own are always liable to this failing), while his superiors laugh at him and the good disapprove. Indeed, as a rule, you will find that arrogance implies a false self-esteem, whereas those who possess true merit find satisfaction enough in the consciousness of possession. Cicero has been severely censured in this connexion, although he was far more given to boasting of his political achievements than of his eloquence, at any rate, in his speeches.