How does Lee Blessing use imagery in Eleemosynary?

The idea of flying is expressed verbally throughout the play and represented by the image of wings and by the actual pair of wings that Dorothea makes Artie wear in a film she shoots to document her attempts "to prove that man" or, in this case, woman "can fly without the aid of any motor of any kind, using only the simple pair of wings you see my daughter . . . wearing."