Stills from Cinema VII's D8 Wash D.C. tape, December 3, 2000.   Click on picture to advance to next frame.

The string leaves a trail.  Don't leave home without it. 

It's helpful if you have a 'thread' to follow and get back to when you get lost. You can think of it like a cross between a theme and a lifeline.  (Tyr Throne)