I found that quote in Walking On Alligators: A Book of Meditations for Writers, by Susan Shaughnessy. She spells out:
"Writers dance with skeletons--their own.
"The one thing you least want to write about--the shame you shiver and shrink from--will work its way into your writing somehow.
"Why? Because that is where your psychic energy has bunched up. In writing about it, you smooth it out."With Halloween just a few days away, it's a perfect time to dig up my skeletons and dance.