Hey Mr. Cunningham. How's your entertainment gettin' along?
During this scene, Atticus is right outside the Maycomb county jail the night before the trial for Tom Robinson. Atticus is disturbed by some trucks that come right up by him while he was reading. These people in the trucks were a lynch mob from Old Sarum.
If you shouldn't be defending him, then why are you doin' it?
If I didn't then I couldn't represent this country in the legislative.
As the mob gets out of their trucks they start speaking to Atticus. Atticus knows that the mob will do what it takes for what they want to do, but it's no reason for Atticus not to try to push them away to protect Tom.
When the mob showed up to the Maycomb County Jail, Scout singled out Mr. Cunningham because she knew him. This shows that Scout has the courage to say what she thinks and single him out, if the mob were going to do anything, Mr. Cunningham would feel ashamed of his actions because Scout was there. Atticus is proud of Scout for standing up for having the courage to stand up for her.
When Scout finds out that Atticus is defending a black man she isn't happy. But Atticus explains that he need to do this or people from town would think different of him. The children learn that it is important to stand up for others even if you see through it anyway. Atticus is courageous because he is doing it for the Robinson family.
The morning after the trial, the black community brought food to the Finch's to show their appreciation for Atticus defending Tom. They gave Atticus and his family food because they were really thankful Atticus defended Tom and the risk Atticus took standing up to racism.
In the end of her life, it was found to be that Mrs. Dubose wanted to overcome her morphine addiction. Its known that overcoming addictions are very hard but Mrs. Dubose had the courage to do it. It showed Jem and Scout that when you have the courage to do something, it is possible to make it happen, but it may not be easiest thing.