Zeno’s death, Sphærus became a pupil of Cleanthes. And we shall speak of him in our account of Cleanthes.
These also were all disciples of Zeno, as we are told by Hippobotus, namely:—Philonides, of Thebes; Callippus, of Corinth; Posidonius, of Alexandria; Athenodorus, of Soli; and Zeno, a Sidonian.
XXXII. And I have thought it best to give a general account of all the Stoic doctrines in the life of Zeno, because he it was who was the founder of the sect.
He has written a great many books, of which I have already given a list, in which he has spoken as no other of the Stoics has. And his doctrines in general are these. But we will enumerate them briefly, as we have been in the habit of doing in the case of the other philosophers.
XXXIII. The Stoics divide reason according to philosophy, into three parts; and say that one part relates to natural philosophy, one to ethics, and one to logic. And