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• He who knows how to be poor knows everything. -- Jules Michelet (1798-1847)
• A layman knows he has to kick it.; An amateur knows where to kick it.
  A professional knows how hard....
• He who knows not and knows that he knows not is ignorant.
  Teach him. He who knows not and knows not that he knows not is a fool....
• He knows not how to speak who cannot be silent...Loudness is impotence.
  -- Johann Kaspar Lavater (1741-1801) "Aphorisms on Man" (c.1788)...
• He is nearest to the gods who knows how to be silent.
  -- Marcus Porcius Cato, (234-149 BC), Roman statesma...
• He is nearest to the gods who knows how to be silent.
  -- Marcus Porcius Cato (234-149 BC), attributed...