The philosopher from whose lessons Cicero certainly learned most at this period was Antiochus of Ascalon, now the representative of a Stoicised Academic school. Of this teacher, however, I shall have to treat later, when I shall attempt to estimate the influence he exercised over our author. It is sufficient here to say that on the main point which was in controversy between Philo and Antiochus, Cicero still continued to think with his earlier teacher. His later works, however, make it evident that he set a high value on the abilities and the learning of Antiochus, especially in dialectic, which was taught after Stoic principles. Cicero speaks of him as eminent among the philosophers of the time, both for talent and acquirement [23]; as a man of acute intellect[24]; as possessed of a pointed style[25]; in fine, as the most cultivated and keenest of the philosophers of the age[26]. A considerable friendship sprang up between Antiochus and Cicero[27], which was strengthened by the fact that many friends of the latter, such as Piso, Varro, Lucullus and Brutus, more or less adhered to the views of Antiochus. It is improbable that Cicero at this time became acquainted with Aristus the brother of Antiochus, since in the Academica[28] he is mentioned in such a way as to show that he was unknown to Cicero in B.C. 62. The main purpose of Cicero while at Athens had been to learn philosophy; in Asia and at Rhodes he devoted himself chiefly to rhetoric, under the guidance of the most noted Greek teachers, chief of whom, was his old friend Molo, the coryphaeus of the Rhodian school[29]. Cicero, however, formed while at Rhodes one friendship which largely influenced his views of philosophy, that with Posidonius the pupil of Panaetius, the most famous Stoic of the age. To him Cicero makes reference in his works oftener than to any other instructor. He speaks of him as the greatest of the Stoics[30]; as a most notable philosopher, to visit whom Pompey, in the midst of his eastern campaigns, put himself to much trouble[31]; as a minute inquirer[32]. He is scarcely ever mentioned without some expression of affection, and Cicero tells us that he read his works more than those of any other author[33]. Posidonius was at a later time resident at Rome, and stayed in Cicero's house. Hecato the Rhodian, another pupil of Panaetius, may have been at Rhodes at this time. Mnesarchus and Dardanus, also hearers of Panaetius, belonged to an earlier time, and although Cicero was well acquainted with the works of the former, he does not seem to have known either personally.