Vitae philosophorum

Ariston, the son of Miltiades and a native of Chios, who introduced the doctrine of things morally indifferent; Herillus of Carthage, who affirmed knowledge to be the end; Dionysius, who became a renegade to the doctrine of pleasure, for owing to the severity of his ophthalmia he had no longer the nerve to call pain a thing indifferent: his native place was Heraclea; Sphaerus of Bosporus; Cleanthes, son of Phanias, of Assos, his successor in the school: him Zeno used to compare to hard waxen tablets which are difficult to write upon, but retain the characters written upon them. Sphaerus also became the pupil of Cleanthes after Zeno’s death, and we shall have occasion to mention him in the Life of Cleanthes.

And furthermore the following according to Hippobotus were pupils of Zeno: Philonides of Thebes; Callippus of Corinth; Posidonius of Alexandria; Athenodorus of Soli; and Zeno of Sidon.[*](Perhaps an error for Zeno of Tarsus.)

I have decided to give a general account of all the Stoic doctrines in the life of Zeno because he was the founder of the School. I have already given a list of his numerous writings, in which he has spoken as has no other of the Stoics. And his tenets in general are as follows. In accordance with my usual practice a summary statement must suffice.[*](Laertius adheres to his plan of arranging doctrine under two heads: (1) a general or summary, (2) a particular, treatment; cf. inf. vii. 48 κεφαλαιωδῶς κατὰ μέρος. Here follows a valuable and full doxography, extending to § 160, collected from various sources; §§ 49-83 come from Diocles. The classification is roughly as follows: divisions of Philosophy, §§ 39-41; Logic, §§ 42-83; Ethics, §§ 84-131; Physics, §§ 132-160.)

Philosophic doctrine, say the Stoics, falls into three parts: one physical, another ethical, and the third logical. Zeno of Citium was the first to make this division in his Exposition of Doctrine, and Chrysippus too did so in the first book of his Exposition of Doctrine and the first book of his Physics; and so

These parts are called by Apollodorus Heads of Commonplace; by Chrysippus and Eudromus specific divisions; by others generic divisions.

Philosophy, they say, is like an animal, Logic corresponding to the bones and sinews, Ethics to the fleshy parts, Physics to the soul. Another simile they use is that of an egg: the shell is Logic, next comes the white, Ethics, and the yolk in the centre is Physics. Or, again, they liken Philosophy to a fertile field: Logic being the encircling fence, Ethics the crop, Physics the soil or the trees. Or, again, to a city strongly walled and governed by reason.

No single part, some Stoics declare, is independent of any other part, but all blend together. Nor was it usual to teach them separately. Others, however, start their course with Logic, go on to Physics, and finish with Ethics; and among those who so do are Zeno in his treatise On Exposition, Chrysippus, Archedemus and Eudromus.

Diogenes of Ptolemaïs, it is true, begins with Ethics; but Apollodorus puts Ethics second, while Panaetius and Posidonius begin with Physics, as stated by Phanias, the pupil of Posidonius, in the first book of his Lectures of Posidonius. Cleanthes makes not three, but six parts, Dialectic, Rhetoric, Ethics, Politics, Physics, Theology. But others say that these are divisions not of philosophic exposition, but of philosophy itself: so, for instance, Zeno of Tarsus. Some divide the logical part of the system into the two sciences of rhetoric and dialectic; while