In the fifth book we are carried back to B.C. 79, and the scene is laid at Athens, where Cicero was at that time under Antiochus and Demetrius. He and his brother Quintus, Lucius Cicero his cousin, Pomponius Atticus, and Marcus Pupius Piso are represented as meeting in the Academia; and Piso, at the request of his companions, lays open the precepts inculcated by Aristotle and his school on the subject of the Summum Bonum; after which Cicero states the objections of the Stoics to the Peripatetic system, and Piso replies. While giving the opinions of these above-named sects with great fairness and impartiality Cicero abstains throughout from pronouncing any judgment of his own. First Book Of The Treatise On The Chief Good And Evil. I. I was not ignorant, Brutus, when I was endeavouring to add to Latin literature the same things which philosophers of the most sublime genius and the most profound and accurate learning had previously handled in the Greek language, that my labours would be found fault with on various grounds. For some, and those too, far from unlearned men, are disinclined to philosophy altogether; some, on the other hand, do not blame a moderate degree of attention being given to it, but do not approve of so much study and labour being devoted to it. There will be others again, learned in Greek literature and despising Latin compositions, who will say that they would rather spend their time in reading Greek; and, lastly, I suspect that there will be some people who will insist upon it that I ought to apply myself to other studies, and will urge that, although this style of writing may be an elegant accomplishment, it is still beneath my character and dignity. And to all these objections I think I ought to make a brief reply; although, indeed, I have already given a sufficient answer to the enemies of philosophy in that book in which philosophy is defended and extolled by me after having been attacked and disparaged by Hortensius.(13) And as both you and others whom I considered competent judges approved highly of that book, I have undertaken a larger work, fearing to appear able only to excite the desires of men, but incapable of retaining their attention. But those who, though they have a very good opinion of philosophy, still think it should be followed in a moderate degree only, require a temperance which is very difficult in a thing which, when once it has the reins given it, cannot be checked or repressed; so that I almost think those men more reasonable who altogether forbid us to apply ourselves to philosophy at all, than they who fix a limit to things which are in their nature boundless, and who require mediocrity in a thing which is excellent exactly in proportion to its intensity.