=122.= We have little reason to regret that only fragments at most remain to us of the works of these philosophers, since CICERO presents to us a comprehensive view not only of the doctrines they professed, but also of the criticisms which their opponents passed upon them, and again of the replies they made to these criticisms. In carrying out this work for Stoicism and its rival systems Cicero not only created the philosophic terminology of the future by his translations of technical terms from Greek into Latin, but also established a new style of philosophic discussion. By the friendly tone of his dialogues, placed in the mouths of men whose common interest in Greek studies made the divergencies of the schools to which they belonged a secondary matter; by the amplitude of his style, which gives itself time and space to approach a difficult conception from many points of view; and by the simplicity of his language and illustrations, which assumes that every philosophical contention can be plainly and forcibly put before the average man of letters, he has set an example of the art of exposition which has perhaps not been surpassed since[68]. His most systematic expositions of Stoic doctrine are as follows. In the _Academica_ a general view of Zeno’s teaching is given by M. Varro (i 10, 35 to 11, 42), and the Stoic logic, as accepted by Antiochus[69], is defended by L. Licinius Lucullus (ii 1, 1 to 19, 63). In the _de Natura deorum_ (bk ii) the Stoic physics is explained by Q. Lucilius Balbus; in the _de Finibus_ (bk iii) the Stoic ethics by M. Porcius Cato, as the most distinguished Roman who has adopted them as a standard of life. In the _de Officiis_ Cicero adopts the form of a letter addressed to his son when studying at Athens, and avowedly adapts the substance of the work of Panaetius already mentioned, supplementing it from a memorandum of the teaching of Posidonius which was specially prepared for him by ATHENODORUS CALVUS[70]; this book deals with ethics mainly in its practical applications. In many of his other works, such as the _de Amicitia_, _de Senectute_, _Tusculan disputations_, _de Fato_, _de Divinatione_, and _Paradoxa_, Cicero makes use of Stoic material without giving professedly an exposition of the Stoic system. [Sidenote: Areius Didymus.]