Beloved as a whole flows pretty smoothly from past to present and from narrator to narrator throughout its entirety. However, towards the end of the book there's a sudden break in the neat structure of the plot. The three chapters representing Sethe, Denver, and Beloved's streams of conscioussness are introduced to reveal certain facets of the character's feelings that the normal dialogue could not fulfill. I'm going to focus on the most important one, Beloved's.
Beloved's stream of consciousness is obviously a narration of a trip on a slave ship. Why did Morrison put this in? In this chaper Beloved is firmly established as more than just a representation of Sethe's past, she becomes the entire history of slavery. She carries with her a burden of the painful history endured by several generations of blacks before her. I think this idea ties in very nicely with how she disappears at the end of the novel. It requires the efforts of the entire community united as one to vanquish the painful past that controls their lives. Sethe cannot do it alone, and is almost destroyed by the spectre of her dead child. I think this passage reveals one of the central themes of the novel: blacks must overcome the pain of their past to develop a sense of pride and individuality for themselves for the future.
I think this is ultimately what Beloved comes to represent after this passage. Anyone agree or disagree with this idea?