I now blindly abandoned myself my uncomplaining wife alas was the most usual and the paitent of suffers.

this quote helps to establish the mood as the narrator advances towards madness  this qoite also helps to build suspense as we do not yet know if the narrator has lethal intent  this quote also helps the plot as we see the vial nature of the narrator beginning to unfold  and finally it helps build the chacter of the narrator who is suffering suffers unknown 

I think it was his eye! yes, it was this! One of his eyes resembles that of a vulture, -a pale blue eye with a film over it. Whenever it fell upon me, my blood ran cold

This quote in "the Tell-Tale Heart" is said by the narrator and murderer of the old man. This quote is important due to its build up of suspense, because it tells what the narrator is furious about and makes you think what might happen next. This quote also builds plot because the story revolves around the idea that the narrator is going to kill the old man because of his eye. It builds a lot of character because it shows what the narrator is mad about, what he feels about it and why he murdered the man. Finally, This quote also establishes the mood and how the narrators feelings become very important in the story.

with an utter depression of soul which i can compare to no earthly sensation more properly then to the after-dream of the reveller upon opium

From the story "Fall of the House of Usher", this quote develops plot by explaining how the character feels and allows you to put yourself in their shoes. it also builds suspense because it makes you wonder what could happen next. This quote builds character by showing what he feels and how he explains his emotions. Lastly, It explains the setting by the emotion of the quote, how it makes the reader feel suspense.

but then without those doors there did stand the lofty enshrouded figure of lady Madeline of usher

this quote helps to build suspense  as the main character is panicking as Madeline approaches to seize her revenge  angist  Rodrick and possibly the narrator it also helps develop   develop the narrator  as character we the reader begins to question  the readers of the sanity.this quote helps move the plot as we reach towards the climax and the fall of the once great house.  this quite helps Establishment
the mood of the horrifying nightmares coming to get you.

Evil thoughts became my sole intimates-the darkest of most evil of thoughts

this quote from the "Black Cat" shows the true emotion of the story, how darkness surrounds the narrator and all inflicted with him. This also helps the story by explaining the narrators thoughts, helping with predicting what will happen next. This quote can also help by getting involved with the story, putting yourself in his place and getting a better understanding of the story. Lastly, it helps understand the setting, what all the characters are living in and helps understand the story

nemo me impune lacessit (no man impunes me without retribution)

this quote by montresser helps the story in many ways  firstly it helps to build suspense as we the readers finally know  of the lethal intent and bad blood between the two it also adds suspense  as fortune finally learns of montresser vial intentions, the saying of his family motto also establishes the mood of the dark grimy as the truth of his plans are revealed,it also develops the plot is it comes to the climax and we learn that the murder is personal.