Instead of remaining in the moment of action in Chapter 7 when Assef is hit in the forehead by a rock thrown by Hassan, Amir closes his eyes, and his thoughts trail away from what he is faced with into points of his past -- two memories and a dream.
The first memory is one of his father's explanation that both he and Hassan were breastfed by the same Hazara woman. The second memory is of a fortune-teller who sees Hassan's future, but won't tell him of what will happen.
The dream is one that is filled with frustration and terror as Amir finds himself alone in a snow storm. He dreams that he is a ghost. A hand reaches out to him, and once he takes the "familiar shape" he is transported to a field with a blue sky above and green, yellow, red, and orange kites flying above.
The author's purpose in including the two memories and a dream is
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