Related:

• Those who know, do not say; those who say, do not know.
• The gift of happiness belongs to those who unwrap it. -- Andrew Dunba
• Why do those who speak loudest always have the least to say?
• Parson: Do you say your prayers before dinner, Andrew? Andrew: No sir, my Mum's a good cook.
• Those that know, do. Those that understand, teach. -- Aristotle
• Those who can, do. Those that can't criticize.
• Men do not live by the mind, you say? I have withdrawn those who do.
  The mind is impotent, you say? I have withdrawn those whose minds aren't....
• Those who can, do; those who can't, simulate.
• Those who can, do. Those who can't, get promoted to management.