The wary expression remains. A seed has been planted in his mind, one that won't germinate for years to come.

"Well...you learn during your training, but no amount of either will make a non-bender a bender. It has to do with an innate spiritual connection that is either there, or it isn't. In the Earth Kingdom I met a set of twins where one was a bender, and the other wasn't. My best friends are brother and sister. They had non-bender parents, but Katara is a waterbender and Sokka isn't."