Aang: We've been looking everywhere for you. The boats are ready to leave.
Sokka: I messed up, Aang.
Sokka: The invasion plan was my moment of truth. And I completely flopped it. I just fell apart.
Aang: Sokka, (walks up to him and places a hand on his shoulder) that speech wasn't your moment of truth. That was just public speaking and nobody's really good at that.
Sokka: My Dad is. He explained the plan perfectly and inspired everyone, Like a real leader should...
Aang: Look, your moment of truth isn't going to be in front of some map. It's going to be out there, on the battlefield.
Sokka: You seem so confident about everything. How do you know we're going to win?
Aang: Because I already failed the world once at Ba Sing Se. I won't let myself fail again.