The main character is trying to convince someone that he is not mad."I heard all things in the heaven and in the earth. I heard many things in hell.How then, am I mad?" He doesn't know how this idea entered his brain but when it did it kept bugging him."It is impossible to say how first the idea entered my brain; but once conceived, it haunted me day and night"
The character starts telling us the story of how he killed the man with the vulture starting with"For his gold, I had no desire. I think it was his eye yes it was this! Yes, it was this! He had the eye of a vulture--a pale blue eye, with a film over it." That's what made the character hate this old man and decide to take his life.
Every night at midnight for the next 8 days the main character would go and watch the old man in his sleep watching for the vulture eye to open. He would go in cautiously every night and just look upon the old man sleeping
On the eight night the character was so cautious more than usually he felt that the time moved faster than usual while he was watching the man asleep he felt powerful."I felt the extent of my own powers-- of my sagacity. I could scarcely contain my feelings of triumph" " And he not even to dream of my secret deeds or thoughts. I fairly chuckled at the idea: and perhaps he heard me. When he was trying to open the lantern then he opened to wide and it fell upon the man and woke him up.
"It was open-- wide, wide open-- and I grew furious as I gazed upon it. I saw it with clear distinction-- all a dull blue" And the old man was up.