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• They say that the first inclination which an animal has is to protect itself.
  -- Diogenes Laertius (c. 200 AD) -- Zeno, lii...
• But Chrysippus, Posidonius, Zeno, and Boethus say, that all things are produced by fate.
  And fate is a connected cause of existing things, or the reason according to which the world is regulated....
• When Zeno was asked what a friend was, he replied, "Another I.
  -- Diogenes Laertius (c. 200 AD) -- Zeno, xix...
• He used to teach that God is incorporeal, as Plato also asserted, and that his providence extends over all the heavenly bodies.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xiii...
• All things are in common among friends. -- Diogenes Laertius (c. 200 AD) -- Diogenes, vi
• The Stoics also teach that God is unity, and that he is called Mind and Fate and Jupiter, and by many other names besides.
  -- Diogenes Laertius (c. 200 AD) -- Zeno, lxviii...
• The chief good he has defined to be the exercise of virtue in a perfect life.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xiii...
• Pythagoras used to say that he had received as a gift from Mercury the perpetual transmigration of his soul, so that it was constantly transmigrating and passing into all sorts of plants or animals.
  -- Diogenes Laertius (c. 200 AD) -- Pythagoras, iv...
• Apollodorus says, "If any one were to take away from the books of Chrysippus all the passages which he quotes from other authors, his paper would be left empty.
  -- Diogenes Laertius (c. 200 AD) -- Chrysippus, iii...