Two examples of what amir remembers about his father's loyalty to hassan which now makes sense?

He remembers that Baba never forgot Hassan's birthday and that on one of Hassan's birthdays, Baba paid to have Hassan's harelip surgically fixed. Amir recalls when he asked Baba if they could get new servants, Baba had gotten furious and yelled at Amir. He had said Hassan and Ali are part of their family and they are not going anywhere. He also remembers that when Hassan and Ali left, Baba wept and wept.