"What promise does Amir breaks"

Amir breaks his promise about taking sohrab to America without being harmed. He was sad and hurt that he broke the promise he made to Sohrab because he made a big promise and broke, and to try and make up for it he volunteered and prayed on doin certain things that have to do with religion like fasting for example. I also think that Amir broke a promise by saying that Sohrab can be part of the family.

"A boy who wont stand up for himself becomes a man who can't stand up to anything"

In my personal thoughts I think the quote means that if you don't take up for or stand up for yourself in a early age, when you grow up you will be the same and standing up for yourself is an important part of being a man. Also in the book "The Kite Runner" Baba said this to Rahim Khan and Rahim Khan said it to Amir.

"Afghans abhor customs but cherish rules"

I think that the quote means that afhanis regard there customs but they obay and follow the rules they set for them in their beleifs. In my own thought I think the quote should be stated as a must because if Afghanis do not obay the rules afghanistan will be much worse, but also they should not abhor customs.