The issue of a father's love or attention becomes the root of why Amir resents Hassan. Amir is bookish, more cerebral, and much more introverted than Hassan, whose nature as a child is quite the opposite. As a child, Amir does not understand why his father demonstrates more outward affection to Hassan, and this becomes the basis of his resentment towards him. Of course, he later understands why this was the case. Both are still friends, and Amir does not let his father's attention ruin the fundamental relationship between both of them. Yet, this issue, or wedge, between how the father perceives both becomes the fundamental issue in reflecting the resentment that Amir has towards Hassan. It is also the reason why Amir does not stand up for nor help Hassan in his time of need. Consequently, it is the reason for the haunting that still follows Amir even when he leaves Afghanistan, triggering his need to return to it.