Help me with 1984 assigment

Discuss the significance and nature of Winston’s dreams. Deconstruct the dream wherein O’Brien claims that they “shall meet in a place where there is no darkness” (page 22), and the dream in which Winston’s mother and sister disappear (page 26). What are the underpinnings of these dreams? What deeper meanings do they hold? Why do you think the author devotes as much time as he does to Winston’s dreams?