Related:

• 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...
• The chief good he has defined to be the exercise of virtue in a perfect life.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xiii...
• Plato affirmed that the soul was immortal and clothed in many bodies successively.
  -- Diogenes Laertius (c. 200 AD) -- Plato, xl...
• He used to define justice as "a virtue of the soul distributing that which each person deserved.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xi...
• He used to say that personal beauty was a better introduction than any lette
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xi...
• 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 apophthegm "Know thyself" is his. -- Diogenes Laertius (c. 200 AD) -- Thales, xiii
• Time is the image of eternity. -- Diogenes Laertius (c. 200 AD) -- Plato, xli
• Another of his sayings was, that education was the best viaticum of old age.
  -- Diogenes Laertius (c. 200 AD) -- Aristotle, xi...