Hosseini tried to demonstrate through different characters that in life you are allowed to make mistakes, and eventually you will be given the time to correct the mistakes you have made, but wether or not you choose to its entirely up to you that is where the saying "There is a way to be good again" plays a very important role. In the book, honor is defined as a characteristic that true friends and family keep to one another. Baba perceives it as a part of his esteem with the example of the food stamps. Amir on the other hand perceives it as a privilege or to keep an agreement.
Also another example is when Amir moved back to Afghanistan to find and adopt his best friends son. That is when he begins to heal himself from his betrayal of his friend. It is what he decides to do when his dying uncle says "you can be good again.In the kite runner ,Baba abandons Hassan to protect his honor and name. This is revealed when Rahim Khan, Baba's close friend says, "It was a shameful situation. People would talk. All that a man had back then, all he was, was his honor, his name, and if people talked we couldn't tell anyone" (Hosseini).