The document discusses how authors use blindness both literally and figuratively in stories to convey important themes and insights about characters. When blindness is introduced early on, it will be significant to the plot or a character's development. Introducing literal blindness also signals figurative themes of seeing or not seeing the truth. For example, in the story "Araby" the main character is blinded to the reality of his romantic interest until the end of the story when he gains clearer insight.