What is the effect of Soraya telling her story? How does the reader view both Soraya and Amir differently in light of her story?

Soraya's story makes her human, and for Amir, he learns that everyone makes mistakes they regret later in life. He also comes to realize that Soraya's secret, which had been a burden to her, was now cast away with the telling. He, however, remained plagued by the shame of his own.