In Chapter 9 , Why is Gatsby's father so proud of him?

Nick tracks down Gatsby's father, Henry C. Gatz, a solemn old man left helpless and distraught by the death of his son. Gatz shows Nick a book in which the young Gatsby kept a self-improvement schedule; nearly every minute of his day was meticulously planned. His father is proud about how far his son had "made it" in life.