There is an anecdote at the end of the book, where Stevenson relates talking to an old woman who attends court hearings just to be there for those who are grieving. She lets them lean on her, put a little bit of that weight on her. She describes herself as being a stonecatcher ("He who is without sin among you, let him first cast a stone at her"), and she takes Bryan's hands in her own and rubs his palms, because she knows what work it is to catch stones, and she knows he's a stonecatcher too. 
 This book made me realize what it is that I've been aspiring to be my whole life. 
 Catching stones like my life depended on it.