Poems, like dreams, have a visible subject and an invisible one. The invisible one is the one you can't choose, the one that writes itself. Not a message that comes at the end of the poem, more like a pathological condition that deforms every word – a resonance, a manner of speaking, a nervous tic, a pressure. And this invisible subject only shows up when you're speaking the language that you speak when no one is there to correct or applaud you. Remembering that language is the whole skill of writing well.
Get Writing (2004), as quoted in Modern Women Poets (2005) by Deryn Rees-Jones, p. 392