The idea of courageous and positive acts as a form of redemption actually pertains to Amir more than any other character in The Kite Runner, but I suppose Baba also exercises this notion. The reader actually has no reason to believe this until an important bit of information is revealed to Amir by Rahim Kahn: Baba is actually the father of Hassan. This fact shows that Baba, too, had reasons to atone for past indiscretions: His sexual liaison with Sanaubar, Ali's wife, produced a son. He kept this secret from both Hassan and Amir for his entire life, taking the secret with him to the grave. Perhaps this is one reason that Baba financed the orphanage in Kabul and why he tried much harder to bond with Amir after they arrived in America. Baba may or may not have felt redeemed at the end--he never revealed the secret about Hassan's heritage to Amir--but he probably died a happier man knowing that Amir was married and thriving in his new home in California.