. . but sing their hearts out for us. That’s why it’s a sin to kill a mockingbird.” These lines from Chapter 10 are the source of the novel’s title and introduce one of the key metaphors of the book: the idea of “mockingbirds” as good, innocent people who are destroyed by evil. Boo Radley, for instance, is like a mockingbird—just as mockingbirds do not harm people but only “sing their hearts out for us,” Boo does not harm anyone; instead, he leaves Jem and Scout presents, covers Scout with a blanket during the fire, and eventually saves the children from Bob Ewell later in the
. . but sing their hearts out for us. That’s why it’s a sin to kill a mockingbird.” These lines from Chapter 10 are the source of the novel’s title and introduce one of the key metaphors of the book: the idea of “mockingbirds” as good, innocent people who are destroyed by evil. Boo Radley, for instance, is like a mockingbird—just as mockingbirds do not harm people but only “sing their hearts out for us,” Boo does not harm anyone; instead, he leaves Jem and Scout presents, covers Scout with a blanket during the fire, and eventually saves the children from Bob Ewell later in the