This question is about "The Tell-Tale Heart"
Answer:
Lines 45-52 show how the narrator has dark and horrible thoughts about the old man, but he behaves like someone who is admirable and kind, making the old man not suspect anything. This shows that the narrator pretends to be something that he is not, that is, he is an unreliable narrator.
Explanation:
In "The Tell-Tale Heart" we are introduced to the narrator who tells the story of how he killed an old man with whom he lived, just because he could not bear to look into a blind eye that the old man had. The narrator does not support the old man, but acts in a friendly manner with him, while planning to kill him. This shows that the narrator is not someone to be trusted and this is even more evident in the phrase "he not even to dream of my secret deeds or thoughts ..."
