The theme of "The Tell Tale Heart", a gothic fiction story by Edgar Allan Poe is don't commit a crime because your guilty conscience will expose you in the end. In paragraph 16 It says " My head ached and I fancied a ringing in my ears," also in paragraph 17 it states " It grew Louder- Louder- Louder!" Both of these show that while the poliece men were at his house he could what he thought was the beating of the old mans heart, but it was just his guilty conscience. And in paragraph 18 the narrator says " I admit the deed!...here, here! - It's the beating of his hideous heart," this is his confession to the murder. As you can see his guilty conscience led him to confess.
The story starts with the narrator, who is a murder, telling the reader that he is not mad.
The mad man had a huge problem with the mans eye.
For 7 nights the mad man watched the old man sleep. Every night he thought about killing the man, but he didn't.
On the 8th night, the mad man killed the old man. He walked into his room and suffocated him with his matress.
The next morning police men came to the house to see if the old man was there. While they were there the mad man heard the beating of the old mans heart.
The sound of the heart was driving the mad man insane to the point that he confessed to the murder of the old man.