"What happened was: they became a team, a family of two. There had been many times before they ran away when they had acted like a team, but those were very different from feeling like a team. Becoming a team didn't mean the end of their arguments. But it did mean that the arguments became a part of the adventure, became discussions not threats. To an outsider the arguments would appear to be the same because feeling like part of a team is something that happens invisibly. You might call it caring. You could even call it love."
From the Mixed-Up Files of Mrs. Basil E. Frankweiler, p. 39
By E.L. Konigsburg