Justin can't sleep that night. His lines swirl through his head, as well as Miranda's assertion that the universe wasn't kind to August. Justin thinks that August didn't do anything to deserve his rare combination of syndromes. As he thinks, Justin reasons that the universe isn't entirely random—if it were, nobody would be cared for. He thinks that August's adoring parents, Jack's loyalty, and Miranda's adoration of August are proof that the universe cares for everyone.
Justin recognizes that even as August grows up and becomes more independent, he will still have people who love him and will care for him as needed. This suggests that in general, moving towards adulthood doesn't mean that one is totally alone, as August seems to fear. Rather, he'll always have people to lean on.