Related:

• 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...
• 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 asked what learning was the most necessary, he said, "Not to unlearn what you have learned.
  -- Diogenes Laertius (c. 200 AD) -- Antisthenes, iv...
• He was once asked what a friend is, and his answer was, "One soul abiding in two bodies.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xi...
• It was a saying of his that education was an ornament in prosperity and a refuge in adversity.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xi...
• Another of his sayings was, that education was the best viaticum of old age.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xi...
• Socrates said, "Those who want fewest things are nearest to the gods.
  -- Diogenes Laertius (c. 200 AD) -- Socrates, xi...
• When he was praised by some wicked men, he said, "I am sadly afraid that I must have done some wicked thing.
  -- Diogenes Laertius (c. 200 AD) -- Antisthenes, iv...
• On one occasion Aristotle was asked how much educated men were superior to those uneducated
  As much," said he, "as the living are to the dead....