Roxas pondered what Nico had said for a while. It was a surprise to him that people with hearts didn't know why they were here either. He had always assumed that was something you'd just feel, once you had a heart. That with a heart, you'd just know.
"Thanks," Roxas said after a while of silence. "I've got it memorized." That was what Axel always used to ask him after he taught Roxas something about the way the world worked. Roxas could still hear his voice, slightly teasing as he asked. Got it memorized? "Maybe I can still stumble through and learn how to manage things without a heart."