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• It may be that your whole purpose in life is simply to serve as a warning to others.
• Perhaps your whole purpose in life is simply to serve as a warning to others.
• It's possible that the whole purpose of your life is to serve as a warning to others.
• The purpose of life is a life of purpose.
• This is a wise maxim, "to take warning from others of what may be to your own advantage.
  -- Terence (185-159 BC) -- Heautontimoroumenos, Act i, Sc. 2, 36, (210.)...
• Tsze-kung asked, saying, "Is there one word which may serve as a rule of practice for all one's life?
  The Master said, "Is not Reciprocity such a word?...