"It doesn't," Fuu agreed, with a faint little smile at the face that Korra made. Deliberately silly comparisons? She would never. "It's possible that Chime is lying or the full truth is something she can't convey in yes-or-no answers. But... a person can have immense power and still be helpless." Her hands clenched unconsciously. Helpless to love, for example... but also to things more physical, like a person laid low by tiny bacteria. "Maybe it's something that saps, and we have to fight it like--like the way the body's cells fight off germs."

She had almost said antibodies, but she didn't know how advanced medicine was on Korra's world. Magic and high science didn't seem to go together for some reason.