(3) Now those are called philosophers, among us, who love Wisdom, the Creator and Teacher of all things, that is, the knowledge of the Son of God; and among the Greeks, those who undertake arguments on virtue. Philosophy, then, consists of such dogmas found in each sect (I mean those of philosophy) as cannot be impugned, with a corresponding life, collected into one selection; and these, stolen from the Barbarian God-given grace, have been adorned by Greek speech.

(2) The dialectic in vogue in the schools, on the other hand, is the exercise of a philosopher in matters of opinion, for the sake of the faculty of disputation.

(6) "From these turned aside, the stone-mason; Talker about laws; the enchanter of the Greeks," says Timon in his Satirical Poems, on account of his quitting physics for ethics. Antisthenes, after being a pupil of Socrates, introduced the Cynic philosophy; and Plato withdrew to the Academy. Aristotle, after studying philosophy under Plato, withdrew to the Lyceum, and founded the Peripatetic sect. He was succeeded by Theophrastus, who was succeeded by Strato, and he by Lycon, then Critolaus, and then Diodorus. Speusippus was the successor of Plato; his successor was Xenocrates; and the successor of the latter, Polemo. And the disciples of Polemo were Crates and Crantor, in whom the old Academy founded by Plato ceased. Arcesilaus was the associate of Crantor; from whom, down to Hegesilaus, the Middle Academy flourished. Then Carneades succeeded Hegesilaus, and others came in succession. The disciple of Crates was Zeno of Citium, the founder of the Stoic sect. He was succeeded by Cleanthes; and the latter by Chrysippus, and others after him. Xenophanes of Colophon was the founder of the Eleatic school, who, Timaeus says, lived in the time of Hiero, lord of Sicily, and Epicharmus the poet; and Apollodorus says that he was born in the fortieth Olympiad, and reached to the times of Darius and Cyrus.

(6) But if a philosophical sect is a leaning toward dogmas, or, according to some, a leaning to a number of dogmas which have consistency with one another and with phenomena, tending to a right life; and dogma is a logical conception, and conception is a state and assent of the mind: not merely sceptics, but every one who dogmatizes is accustomed in certain things to suspend his judgment, either through want of strength of mind, or want of clearness in the things, or equal force in the reasons.