The main theme is the fragility of sanity, guilt versus innocence, and the unrelenting passage of time. The fragility of sanity: the narrator's attempt to prove his sanity, his erratic mannerisms while he explains his meticulous plans for killing the old man only prove his madness.
The inspiration of <span>the windshield wiper came from Andersen's experience</span> <span>during a trip to New York City when she</span><span> noticed that streetcar drivers had to open the windows of their cars when it rained in order to see.</span>
Drawling logical conclusions
How are we supposed to know because your the one who learned it.