Kindly explain the significance of Mannon house in Mourning Becomes Electra

The MannonHouse:

The house is like a monster swallowing its own breed its windows are “revengeful eyes”, rejecting rather than accepting the warm sunlight, and the shutters are like eyelids. The play begins with open windows and shutters, but when Ezra returns the windows and shutters are closed the house front becomes a death mask expressive both of Ezra’s life-denying puritanism and Christine’s evil Spirit. When Ezra tells her about the Mannon death worship, she keeps her eyes closed, her face resembling a death mask, indicating that she is a victim of the very tradition he is commenting on and which is expressed in the house front. He asks her to open her eyes, but almost immediately entreats her to close them again––an illustration, it seems of Ezra’s willingness but utter inability to free Christine of her death mask. The shutters remain closed also after Ezra’s death, for which his corpse in it, the house is literally a tomb and besides it is now Lavinia who rules the house.
In the third part Lavinia’s attitude has changed. It is now Orin who locks himself up, behind closed blinds on the study, hiding from the world with his guilt. Lavinia, on the other hand, is firmly determined to drive the ghosts away. She has strength enough to open the shutters in thestudy, claiming that the air in it is suffocating for Orin––as indeed it willshortly prove to be : soon he is to kill himself in the study. It is, also due to her that he shutters are fastened back and that the windows are open in the final act With Orin dead and escape from the Mannons imminent, Lavinia repeats her mother’s worship of light and air. Then, in a crushing anagnorisis, she discovers that she can rid herself of the evil Mannon spirit only by living with it. She closes her eyes, that is she ‘dies’. And, without opening her eyes she says strangely as if to herself : “Why can’t the dead die !”
She is not merely thinking of the Mannon ghosts ; she is also addressing herself, wishing her own death. ‘Dead’ herself now, it only remains for her, the last Mannon to
prepare her own tomb. She orders the shutters nailed tight and buries herself in the darkened house which seems to be her tomb.

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If Winter comes,
Can Spring be Far Behind...??

kindly explain the importance of speaking skill of English language.