A story within the art piece. A hidden meaning. An abstract concept.
On occasion the artist is generous and reveals to the viewer the reason and meaning behind their creations...often the observer must discover and invent their own interpretation.
Take the piece by Heather Burwell titled 'Within Without'. The work has been inspired by a book The Yellow Wallpaper by Charlotte Perkins Gilman. In the 19th centuary a woman suffering from postnatel depression is prescribed to stay in a room and rest by her doctor and Husband.