In the novel 'To Kill A Mockingbird' by Harper Lee, our narrator, Scout, shows an awareness of justice and fairness a few times. Sometimes it even makes her sad, which shows she has empathy - a lovely quality in a child. For example , she feels sorry for Boo Radley - and maybe even a little bit guilty because she feels that he gave and gave, and she gave nothing back :
"Boo was our neighbor. He gave us two soap dolls, a broken watch and chain, a pair of good-luck pennies, and our lives. But neighbors give in return. We never put back into the tree what we took out of it: we had given him nothing, and it made me sad."
She is saying that they were not being 'neighbourly' maybe by letting Boo down. Good neighbours look out for one another. She is being quite hard on herself though as often people give for the joy of it, not necessarily hoping for anything in return. But still she feels that it would have been only fair to leave a little something in the tree by way of a thank-you or an exchange.