It's good for someone to stick up for their family.
Bill's younger brother Bob is getting picked on at school and Bob asks him for help.
Bill needs to decide how to help.
Bill tells Bob that tomorrow he'll scare off the bully for him.
Bill tells Bob that he needs to learn to stand up for himself and that Bill can't fight all Bob's battles.
Bob gets left alone by the bully after Bill tells the bully to knock it off or else.
Billy continues to get picked on at school because Bob refused to intercede.