Aang: You know what the Fire Lord is doing is wrong, so you don't have to be like him. You can show some compassion.

Zuko: How dare you? I'm the Crown Prince of the Fire Nation. I'll be the example for all Firebenders. And my father is a great man. Compassion? Compassion is a sign of weakness.

(Zuko attacks Aang with fire ball, Aang knocks him out with his powers...)

Aang: I'm sorry. I didn't mean to hurt you. I have a feeling you've been hurt more than enough.