How did "The Tell-Tale Heart" make you feel as a listener and reader? Why did you feel that way?

The narrator of Edgar Allan Poe's story opens the tale by insisting that he is not only sane, but also stronger because of a recent illness that has rendered his "mind ... feelings ... senses stronger, more powerful." In particular, he claims that his "sense of hearing especially became more powerful." A thoughtful reader will understand right away that the narrator's protestations of his sanity are a red flag that something is wrong with his thought process. Generally speaking, people who are well-adjusted and healthy don't need to verbally affirm their mental fitness. The narrator, however, assures his audience that he will, in fact, prove "how healthy [his] mind is."