What Is the Theme of "The Black Cat" by Edgar Allan Poe?

Some themes of "The Black Cat" by Edgar Allan Poe include mixed emotions, loyalty, death, transformation, justice, illusions, guilt, relationships and superstition. In the story, a black cat leads the narrator down a path of insanity as a personification of all that he hates. As the narrator falls more into alcoholism, his grip on reality loosens more and, by the end of the story, he is consumed with guilt about the murder of his wife.