"Those who wrote" [gnomic rubai diptych]

Those who wrote were susceptible
      of some misconstruing
those who did could be subject to
      subsequent undoing
those who didn't never discovered
      the deed indeed
those who wroten't discerned no bulb
      to require unscrewing

the silence could seem commensurate
      with the happenstance
the music could grow importunate
      so one had to dance
if those who dancen't never find
      the sooth forsooth
yet the poem may prove considerate
      of coincidence