<s>[INST] In the world of the short story 'A Tell Tale Heart' by Edgar Allan Poe, the narrator is driven mad by the old man's 'evil eye.' Discuss how this obsession with the eye leads the narrator to commit murder.
In your discussion, you can include any relevant ideas, themes or techniques used by Poe to create a sense of tension and foreboding throughout the story.

In your answer, you must include:
* A clear, concise thesis statement 
* Relevant textual evidence to support your argument 
* A discussion on the author's use of symbolism, foreshadowing and imagery in the story. 
* An analysis of the narrator's psychological state throughout the narrative.

The narrator's fixation on the old man's 'evil eye' is the driving force behind his decision to commit murder, as it symbolises his own guilt and paranoia, ultimately leading to his downfall.

The narrator's obsession with the old man's eye is evident from the beginning of the story, 'True!-nervous-very, very dreadfully nervous I had been and am; but why will you say that I am mad?[/INST]