Inside the angels is an emptiness
where evil would have lived;
but was withheld instead-
leaving half the mirror in darkness.
Inside the demon's a kind of hole
where good would have defined
half of the ticking mind-
to constitute a soul.
No soul lives wholly good or evil;
there's only half the requisite
polarity, that there must visit-
to enhance the memory's retrieval.
Patti Masterman
http://www.poemhunter.com/poem/where-evil-would-have-lived/