Related:

• He knows not his own strength that hath not met adversity. -- Ben Jonso
• It is a wise father that knows his own child. -- William Shakespeare, "The Merchant of Venice
• He who knows only his own side of the case knows little of that. -- John Stuart Mill
• We teachers can only help the work going on, as servants wait upon a master. -- Maria Montessori
• How many light bulbs -- does it take to change a light bulb?
  One, if it knows its own Goedel number. Note: A Goedel Number is one of several ways to encode a Turing Machine, the classical abstraction of a computer, or for that matter of any algorithm....
• No one gets into trouble without his own help.
• No one is unemployed who minds his own business.
• It is a wise father that knows his own child. -- William Shakespeare (1564-1616), The Merchant of Venice -- Act ii, Sc.
  2...
• Moderator: Knows all, sees all, trips over his/her own two feet.