In horror literature, the degradation of a protagonist's sense of reality is commonplace. In Poe's "The Tell-Tale Heart," Lovecraft's "The Temple," and King's "Survivor Type," each protagonist's rational psyche deteriorates due to their environment, behaviors, and emotions. The environment the narrators find themselves in is the first domino in a complex web that is inadvertently toppled, creating a knockdown effect in their minds that can rarely be reversed. A person's behavior, actions and/or character would unequivocally affect their psyche. The narrator's perceptions and thoughts are affected by his behaviors in such a way that they slowly lead him into an inescapable psychosis. Volatile emotions have serious consequences on their fragile mental health. Emotional responses range from euphoria to melancholy and undoubtedly lead to a collapse of their known reality. Edgar Allen Poe's publication of "The Tell-Tale Heart" is one of several exemplary horror pieces that incorporate the theme of the Narrator losing his perception of reality, effectively becoming psychotic. In this play, the narrator resides with an older man who is the source of the narrator's psychopathic outburst. This would be considered under the domino of environment, the narrator kept this old man close, allowing his mind to become twisted by the illusion that the old man's eye was the cause of their episode. I think it was his eye. ! Yes, that was it! One of its eyes looked like a vulture's – a pale blue eye covered in film. Each time it fell on me, my blood ran cold, and so, little by little, very gradually, I decided to take the old man's life and thus rid myself of this eye forever. (Poe...... middle of paper...... his past. In conclusion, "The Tell-Tale Heart" by Edgar Allen Poe, "The Temple" by HP Lovecraft and "Survivor Type" by Stephen King all beautifully incorporates the motif of the narrator or protagonist losing his grip on reality over the course of the story. The narrator's or protagonist's environment, behaviors, and emotions cause this loss of reality. spirit has been a success in the horror genre for generations of writers, and will continue to be so for many more. The effects felt by the narrator or protagonist are irreversible and will continue to disturb them, killing them very slowly. Do the minds of those suffering from such psychoses suffer internally as we see them externally? That is the question “I have gone mad, with long intervals of horrible mental health” – Edgar Allen Poe...