Related:

• A society grows great when old men plant trees whose shade they know they shall never sit in.
  -- Greek Proverb...
• Many people know how to attain success, but few know how to make the best use of it.
• He who studies books alone will know how things ought to be
  and he who studies men will know how they are....
• Paratrooper and Greek lover, both know how to pack a chute.
• Do you know how many musicians it takes to change a lightbulb?
  No, big daddy, but hum a few bars and I'll fake it....
• Most people know how to keep silent but few of us know when.
• Your wise men don't know how it feels To be thick as a brick. -- Jethro Tull, "Thick As A Brick
• Don't open a shop unless you know how to smile. -- Jewish proverb
• Don't open a shop unless you know how to smile. Jewish Proverb