Euphemism in To Kill a Mockingbird?

One example of a euphemism in "To Kill a Mockingbird" is when Atticus tells Scout that he's been appointed to defend Tom Robinson in court because he "couldn't pass up the chance." In reality, Atticus was assigned to the case and didn't have a choice in the matter, but he presents it with a more positive spin to his daughter. This use of language softens the harsh reality of the situation.