TRUE! --nervous --very, very dreadfully nervous I had been and am; but why will you say that I am mad?
He had never given me insult. For his gold, I had no desire. I think it was his eye! yes, it was this! He had the eye of a vulture
The narrator is telling the story of how he kills the old man and while he is telling it to the police officers, he is trying to convince them that he is not insane. "If I were mad," he said, "I wouldn't have taken such precautions to hide the body.
The narrator tells how he is terrified of the old man's eye and that whenever his gaze falls upon it, his blood runs cold.
The old man notices the narrator as he enters the room and the old man speaks, terrified that someone has entered his room. this image of the narrator watching the old man while he sleeps makes the audience feel even more skeptical of what the narrator is saying about not being crazy.
The narrator pushes the bed onto the old man killing him, the narrator then slides the heavy bed off the old man and inspects the corpse. As he recollects his deed, he laughs. This shows that the narrator is growing more insane by the second and that his actions throughout the story is taking a toll on his sanity.
The narrator dismembers the corpse of the old man and deposits them between the scantlings under the floorboards. He explains how cautiously and expertly he puts the boards back in place so that not even a human eye, nor the old man's vulture eye could see.