He used to teach that God is incorporeal, as Plato also asserted,

Related:

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