The narrator decides to murder the old man because of his vulture-like eye and the fear it instills in him. He plans the murder meticulously, ensuring that no trace is left behind.
There are two narrators in Heart of Darkness. The first is unknown and the second is Marlow.
First person narrative with an unreliable (nay mad) narrator.
The narrator
The narrator of "The Tell-Tale Heart" comes across as unreliable, neurotic, and consumed by guilt and paranoia. His obsessive behavior and erratic thoughts create a sense of unease and tension for the reader.
the light in the lantern blew out
The sound that drives the narrator to confess the crime is a heart; (the heart of the man he killed or the his own?)
First person He's unreliable.
Narrator
They have much in common both being unreliable and mad. But to the differences. In the Cask of the Amontillado the narrator is angry and bent on revenge. In the tell-tale heart the narrator is sincere and acts our of paranoia.
One is where the narrator first looks into the landlord's bedroom with the intent to kill him, but the narrator does nothing at that time. Another is the second time the narrator peaks into the landlord's bedroom and he sees his vulture like eye open. The old man calls out and the narrator fears he is being seen and stays still for, as he says about an hour. Another point of suspense is when the narrator is talking to the policemen and he fears the policemen can hear the beating heart.
Learning something by the heart can be stressful but there are some different ways you can do it. Try learning so many lines at a time, or remember the first paragraph by saying it over and over until you know it by heart.
No, "The Tell-Tale Heart" does not have an omniscient narrator. The story is told from the point of view of an unnamed character who is involved in the events. This character is unreliable and is not aware of everything happening around them.