Chapter 11 in Harper Lee's To Kill a Mockingbird is an excellent example of the Golden Rule, to treat others as you want to be treated.
In chapter 11, the children's relationship with their neighbor Mrs. Henry Lafayette Dubose is explained. Mrs. Dubose is quite racist and often yells mean things at Scout and Jem when they walk by her house. She also believes strongly in the Confederate government and is believed to keep a pistol hidden in her shawl whenever she sits on her porch.
Despite the racist comments and yelling that Mrs. Dubose uses as her greeting to the Finch family each time they walk by her house, Atticus Finch teaches his children to treat her with respect because she is "just a sick, old lady." Atticus always tips his hat to Mrs. Dubose and wishes her a good day, even after she calls him horrible names and even though their opinions on most topics are very different. Atticus believes so strongly in the importance of treating others how he would want to be treated that he requires Jem to spend time reading to Mrs. Dubose.
Atticus understands the importance of kindness in a world full of so much hatred, and he encourages his children to live by the Golden Rule as well.