Aang: Violence is never the answer.
Zuko: So what are you going to do when you face my father?

sokka: "what's going on? did we get captured again?"
aang: "it's nothing. i just had a bad dream. go back to sleep."
sokka: "don't have to tell me twice"

Mai: Ah just take the bear

Toph: What you call dirt i call a healthy coating of Earth

Well I think you all look perfect!

you have to look within yourself to find yourself so that your true self can reveal itself (zuko pretending to be uncle iroh)

Sokka: (mockingly, as they take off on Appa) Yeah, this makes a alot of sense. Let's bring the guy who's constantly trying to kill us!

Sokka: (about who the commanding officer of the Fire Nation is) His name is Zhao. Middle aged. Big side-burns. Bigger temper.

Sokka: I'm not one to complain, but can't Appa fly any higher?
Aang: I’ve got an idea, why don’t we all get on your back and you can fly us to the North Pole?

Sokka: So then the question became, how do you keep a lid on hot air?
Katara: Awww, if we only knew.