If you asked Sokka, this was ridiculous. Aang was putting them in danger to rescue a hundred-some-year-old king who might not even be there.

Katara tried suggesting looking for a different teacher, but Aang's face was set.

"This isn't about finding a teacher." His eyes grew wider; his voice softened. "This is about finding a friend."

Then Sokka got it. He saw the look in Aang's eyes – and recognized it. Determined, fiercely protective: the look of a person who would do anything to save his friends.

And if Sokka or Katara were in danger, Aang would look just the same.