I was shocked that wasn't mentioned in the article. It's still as biting today. It definitely moved me, and has influenced my perspective on and choice of work.

If you don't know it you should listen to to that link of Gil Scott-Heron reading it, but here are the words if you prefer not to youtube:

    A rat done bit my sister Nell.
      (with Whitey on the Moon)
    Her face and arms began to swell.
      (and Whitey's on the Moon)
    I can't pay no doctor bill.
      (but Whitey's on the Moon)
    Ten years from now I'll be paying still.
      (while Whitey's on the Moon)