A Legend in the Middle East
A spindly little sparrow is lying on his back in the middle of the road. A horseman comes by, dismounts and asks the sparrow what he's doing lying upside down like that.  "I heard the heavens are going to fall today," said the sparrow. "Oh," said the horseman, "and I suppose your spindly little legs can hold up the heavens." "One does what one can," said the sparrow. "One does what one can!."
- Source: The Effective Management of Volunteer Programs by Marlene Wilson