was born in Cyprus at some date unknown, but his life may be said
roughly to be between the years 350 and 250 B.C. Cyprus has
been from time immemorial a meeting-place of the East and West,
and although we cannot grant any importance to a possible
strain of Phoenician blood in him (for the Phoenicians
were no philosophers), yet it is quite likely that through
Asia Minor he may have come in touch with the Far East.
He studied under the cynic Crates, but he did not neglect other
philosophical systems. After many years' study he opened his
own school in a colonnade in Athens called the Painted Porch,
or Stoa, which gave the Stoics their name. Next to Zeno,
the School of the Porch owes most to Chrysippus (280--207 b.c.),
who organised Stoicism into a system. Of him it was said,
'But for Chrysippus, there had been no Porch.'

The Stoics regarded speculation as a means to an end and that
end was, as Zeno put it, to live consistently omologonuenws zhn
or as it was later explained, to live in conformity with nature.
This conforming of the life to nature oralogoumenwz th fusei zhn.
was the Stoic idea of Virtue.

This dictum might easily be taken to mean that virtue consists in yielding
to each natural impulse; but that was very far from the Stoic meaning.
In order to live in accord with nature, it is necessary to know
what nature is; and to this end a threefold division of philosophy
is made--into Physics, dealing with the universe and its laws,
the problems of divine government and teleology; Logic, which trains
the mind to discern true from false; and Ethics, which applies
the knowledge thus gained and tested to practical life. The Stoic
system of physics was materialism with an infusion of pantheism.