Remember that listeners have got imaginations and sometimes their imaginations are richer than anything they can hear. Tell your stories right and the listener tells as much of the story as you do. Fact, the listener might tell the better parts of the story.
That little qualification "sometimes" opens the reader to a world of circumstance. Also if you read carefully you may stumble upon the concept that a single reader may have more than one type of imagination. Some of those imaginations see what is not heard.
And so for day 420
06.02.2008