Aang: I never asked to be special.
Gyatso: But you are. Aang, you are the Avatar. The Fire Nation has embarked on a dark path. Their actions threaten to throw the world out of balance. Only the Avatar, the one person who can master all four elements, can save the world. The world needs the Avatar. The world needs you, Aang. You're to leave right away so you can begin training in the other disciplines.
Aang: Right away? Leave my friends? Leave home? Leave you?
Gyatso: Now, this would be a huge burden for anyone, but you're not just anyone, Aang. You're strong and kind and generous. Remember that. Always remember who you are because I can't imagine a better person to have been given this power.
Aang: I don't want... the power.
Gyatso: Which is why you will make a great Avatar.