Mayor Tong: (cowers) You! Avatar! Do something!
Aang: Gee, I'd love to help, but I'm supposed to be boiled in oil.

Mrs. Kwan: Do you have a name, or shall we just call you Mannerless Colony Slob?

Ozai: (dryly) I should count myself lucky that the new Fire Lord has graced me with his presence in my lowly prison cell.
Zuko: You should count yourself lucky that the Avatar spared your life. Banishing me was they best thing you did for my life. It put me on the right path. Perhaps your time in here could do the same for you.
Ozai: (eyes narrow) Why are you really here?
Zuko: Because you're going to tell me something. (kneels down to look his father into the eye) Where... is... my mother?

Ozai: After generations of Fire Lords failed to find you, now the universe delivers you to me as an act of providence.
Aang: Please listen to me! We don't have to fight. You have the power to end it here and stop what you're doing.
Ozai: You're right, I do have the power. I have all the power in the WORLD!

Ozai: Father, you must have realized as I have that with Lu Ten gone, Iroh's bloodline has ended. After his son's death, my brother abandoned the siege at Ba Sing Se, and who knows when he'll return home. But I am here Father and my children are alive.
Azulon: Say what it is you want!
Ozai: Father, revoke Iroh's birthright. I am your humble servant, here to serve you and our nation. Use me.
Azulon: You dare suggest I betray Iroh, my first born, directly after the demise of his only beloved son?! I think that Iroh has suffered enough. But you, your punishment has scarcely begun!

Ozai: It's time for this world to end in fire, and for a new world to be born from the ashes.
Into the Inferno

Ozai: Sozin's Comet is almost upon us and on that day will endow us with the strength and power of a hundred suns. No bender will stand a chance against us.
General Shinu: What are you suggesting, sir?
Ozai: When the Comet last came, my grandfather, Fire Lord Sozin used it to wipe out the Air Nomads. Now I will use its power to end the Earth Kingdom... permanently! From our airships we will rain fire over their lands. A fire that will destroy everything. And out of the ashes, a new world will be born. A world in which all the lands are Fire Nation and I will be the supreme ruler of everything!

Ozai: What...what did you do to me?
Aang: I took away your firebending. You can't use it to hurt or threaten anyone else ever again.

Ozai: You're weak, just like the rest of your people! They did not deserve to exist in this world - in my world! Prepare to join them! Prepare to die!
Avatar Aang

Party Guest 1: (about the king's bear) He's taking all the good stuff!
Party Guest 2: Shut up! Do you know what I had to do to get seats this close to the bear?

Piandao: (after their duel) Excellent work, Sokka. I think I'm a little old to be fighting the Avatar.
Aang: (shocked) How did you know?
Piandao: Oh, I've been around a while. You pick things up. Of course I knew from the beginning that Sokka was Water Tribe... You might want to think of a better Fire Nation cover name. Try Lee. There's a million Lees.
Katara: But why would you agree to train someone from the Water Tribe?
Piandao: The way of the sword doesn't belong to any one nation. Knowledge of the arts belongs to us all.

Piandao: Don't think of your sword as a weapon. Think of it as another part of your body.
Sokka: Like a second head?
Piandao: More like an extra-long, really sharp arm.

Prison guard (when Mai uses her knives to pin his arms to the wall): What are you doing?!
Mai: Saving the jerk who dumped me.

Professor Zei: [About Appa] Delightful! I only wish I spoke his tongue. Oh, the stories this beast could tell.
Momo: (chittering to the Professor)
Professor Zei: Shush, chatty monkey!

Roku: (after watching his younger self fail to speak to Ta Min) Love is hard, when you're young.
Aang: You don't have to tell me.
Roku: Don't worry, it gets better.