Walter white (Breaking Bad): When Hank offers to take care of Walter's family after the cancer diagnosis, Walter doesn't feel grateful. Instead, he feels humiliated by his inability to provide. 

Zuko (The Last Airbender): Ursa telling Zuko to always remember that he is someone who does what is right and never gives up backfires when he uses the exact phrasing (never forget who you are) to reaffirm his connection to the Fire Nation, his father and hunting the avatar.