What is the meaning of Amir's dream about his father wrestling the bear?

In Amir's dream, he believes he is seeing his father wrestle a bear. in the end, he realizes it is he that wrestles the bear, and wins. There are several existing theories on the meaning of Amir's dream. One of the most popular is that Amir is actually Wrestling with his father and his father's sins. Another theory is winning the fight brings Amir into manhood, and finally on equal terms as his father.