i became what i am today at the age of twelve". that is the first sentence of the book amir says "kabul has made me who i am tooday". what has amir become?

Amir has become a man with much guilt and tragedy in his life. One of the main themes in the story surrounds Amir's lack of courage in helping Hassan from getting beaten and raped by the village socio-path. This event hauts Amir until the end of the story. Amir spends much time trying to compensate for his guilt in so many ways.