Most of these philosophic treatises were composed near the end of Cicero's life, largely in one marvelously productive year, 45-4 B.C., just previous to the slaying of Cæsar. Not all even of the extant works have been catalogued here. The 'Academica' and 'De Divinatione' should at least be mentioned.
Such were Cicero's distractions, when cut off from political life and oratory, and above all when bereft by Tullia's death. The especial 'Consolatio,' composed to regain his courage after this blow, must head the list of lost works. It took a most pessimistic view of human life, for which it was reproved by Lactantius. Another perished essay, the 'Hortensius,' introducing the whole philosophic series, upheld Milton's thesis, "How charming is divine philosophy," and first turned the thoughts of Augustine to serious study.
Cicero's poems, chiefly translations, are extant in copious fragments. They show metrical facility, a little taste, no creative imagination at all. A final proof of his unresting activity is his attempt to write history. Few, even among professional advocates, could have less of the temper for mere narration and truth. Indeed, reasonable disregard for the latter trammel is frankly urged upon a friend who was to write upon the illustrious moments of Cicero's own career!
We said at first that the caprice of fate had exaggerated some sides of Cicero's activity, by removing all competitors. In any case, however, his supremacy among Italian orators, and in the ornate discursive school of eloquence generally, could not have been questioned.
Yet more: As a stylist, he lifted a language hitherto poor in vocabulary, and stiff in phrase, to a level it never afterward surpassed. Many words he successfully coined, chiefly either by translation or free imitation of Greek originals. His clear, copious, rhythmical phrase was even more fully his own creation. Indeed, at the present moment, four or five great forms of living speech testify to Cicero's amazing mastery over both word and phrase. The eloquence of Castelar, Crispi, and Gambetta, of Gladstone and of Everett, is shot through and through, in all its warp and woof, with golden Ciceronian threads. The 'Archias' speaks to any appreciative student of Western Europe, as it were, in a mother tongue which dominates his vernacular speech. Human language, then, has become a statelier memorial of Cicero than even his vanity can ever have imagined.