There is no object, no money, no passion; the narrator kills the man for the fear caused by a dreadful and atrocious eye. This seems insane enough but the narrator tries to prove his saneness through his description of the murder. The twisted logic of the narrator directly proves him to be insane. In the short story, "The Tell Tale Heart" by Edgar Allan Poe, the narrator tries to prove his sanity, but his description of his irrational logic, his acute perception, and his bizarre actions prove him to in fact be mad.

The illogical reasoning used by the narrator throughout the story does not prove his sanity; rather it proves him to be insane. The narrator feels he is "haunted day and night" by the blue eye that "vex [es]" him. The eye becomes the main cause of killing the man. The narrator...