Book 12
11.24
How wide, almost universal, was the knowledge that Varro communicated to the world! What of all that goes to make up the equipment of an orator was lacking to Cicero? Why should I say more, since even Cornelius Celsus, a man of very ordinary ability, not merely wrote about rhetoric in all its departments, but left treatises on the art of war, agriculture and medicine as well. Indeed the high ambition revealed by his design gives him the right to ask us to believe that he was acquainted with all these subjects.
11.25
But, it will be urged, to carry out such a task is difficult and has never been accomplished. To which I reply that sufficient encouragement for study may be found in the fact, firstly, that nature does not forbid such achievement and it does not follow that, because a thing never has been done, it therefore never can be done, and secondly, that all great achievements have required time for their first accomplishment.
11.26
Poetry has risen to the heights of glory, thanks to the efforts of poets so far apart as Homer and Virgil, and oratory owes its position to the genius of Demosthenes and Cicero. Finally, whatever is best in its own sphere must at some previous time have been non-existent. But even if a man despair of reaching supreme excellence (and why should he despair, if he have talents, health, capacity and teachers to aid him?), it is none the less a fine achievement, as Cicero Or. i. 4. says, to win the rank of second or even third.