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• A wise man knows everything, but a shrewd man knows everyone.
• If "everybody knows" such and such, then it ain't so, by at least ten thousand to one.
• The wise man seeks everything in himself; the ignorant man tries to get everything from somebody else.
• A cynic is a man who knows the price of everything and the value of nothing. -- Oscar Wilde
• WILDE's definition of a cynic. A man who knows the price of everything and the value of nothing.
• No one really knows the detailed workings of everything around them. -- Redford
• The fool doth think he is wise, but the wise man knows himself to be a fool.
  -- William Shakespeare (1564-1616), As You Like It -- Act v, Sc. 1...
• An expert is one who knows more and more about less and less until he knows absolutely nothing about everything.