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 when they become men.
  -- Diogenes Laertius (c. 200 AD) -- Aristippus, iv...
• 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...
• When Zeno was asked what a friend was, he replied, "Another I.
  -- Diogenes Laertius (c. 200 AD) -- Zeno, xix...
• 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 AD) -- Diogenes, vi...
• When asked what wine he liked to drink, he replied, "That which belongs to another.
  -- Diogenes Laertius (c. 200 AD) -- Diogenes, vi...
• When Thales was asked what was difficult, he said, "To know one's self.
  And what was easy, "To advise another." -- Diogenes Laertius (c. 200 AD) -- Thales, ix...
• Aristotle was once asked what those who tell lies gain by it.
  Said he, "That when they speak truth they are not believed....
• Asked from what country he came, he replied, "I am a citizen of the world.
  -- Diogenes Laertius (c. 200 AD) -- Diogenes, vi...
• Antisthenes used to say that envious people were devoured by their own disposition, just as iron is by rust.
  -- Diogenes Laertius (c. 200 AD) -- Antisthenes, iv...