Korra’s story in Book 2 was about humans moving beyond their ordinary abilities and becoming something extraordinary. When she loses her connection to the past Avatars and her Avatar spirit, Korra looks deep within and forms a new connection with the cosmic version of herself In Hindu philosophy, there is a concept called atman, which is defined as the “innermost essence of each individual,” or “the supreme universal self.” This is my interpretation of what Korra sees and becomes when she meditates. The giant blue cosmic Korra is a visual representation of her inner essence.
Michael Dante DiMartino
Page 164 of Book 2 art book