How we cite our quotes: All quotations are from Harry Potter and the Prisoner of Azkaban.
Quote #7
LUPIN: Your father never set much store by the rules either. But he and your mother gave their lives to save yours. Gambling their sacrifice by wandering the castle unprotected with a killer on the loose seems to be a pretty poor way to repay them!
Sirius may be Harry's official godfather, but Lupin fills that role when Sirius is unable to—whether it's because he's a fugitive or currently a dog. He reminds Harry that, even though his parents are dead, he should still try to live as they would have wanted him to.
Quote #8
HARRY: It was my dad. It was my dad who conjured the Patronus.
Hermione attempts to delicately tell Harry that his father his dead. He knows that. And she knows that he knows that. But she's concerned that her friend is becoming delusional and imaging that his parents are still alive.
Quote #9
SIRIUS: I expect you're tired of hearing this but you look so like your father. Except your eyes. You have.
HARRY: My mother's eyes.
Considering Harry misses his parents so much, he probably doesn't ever tire of hearing it, especially because they were good people. He wants to live up to their expectations.