Aristippus said that a wise man's country was the world.

Related:

• Aristippus being asked what were the most necessary things for well-born boys to learn,
  said, "Those things which they will put in practice...
• It takes a wise man to discover a wise man. -- Diogenes Laertius (c.
  200 AD) -- Xenophanes,...
• Asked from what country he came, he replied, "I am a citizen of the world." -
  Diogenes Laertius (c. 200 AD) -- Diogenes,...
• The apophthegm "Know thyself" is his. -- Diogenes Laertius (c.
  200 AD) -- Thales,...
• The chief good he has defined to be the exercise of virtue in a perfect life.
  Diogenes Laertius (c. 200 AD) -- Aristotle,...
• Be of good cheer," said Diogenes; "I see land." --
  Diogenes Laertius (c. 200 AD) -- Diogenes,...
• Diogenes said once to a person who was showing him a dial,
  "It is a very useful thing to save a man from being...
• When a man reproached him for going into unclean places,
  he said, "The sun too penetrates into privies, but...
• When asked what he would take to let a man give him a blow on the head,
  he said, "A helmet." -- Diogenes Laertius (c. 200...