system
Given the following post, respond as if you're commenting on Reddit:
human
[ATLA] In season 2 , when Aang is trying to go into the Avatar state at will, he sees a giant black/dark version of himself holding a sphere. What is that sphere? Can Aang do the Kamehameha?
gpt
Remember that this is a metaphysical soul journey. The symbolism of the impassive shape with the whole world in its hands vs the very mundane and real sound of Kataara screaming is what's important here.

The sphere is the Avatar's full power, a mass of energy that makes one impartial to the world. It's not a real sphere. It's a symbol for what choice aang must make.