In Chapter Three of "To Kill A Mockingbird", after Calpurnia makes Scout leave the table ,what lecture does she give Scout?

In Chapter 3, Scout rudely calls attention to the table manners of Jem's guest, Walter Cunningham. Calpurnia scolds Scout telling her that when people differ, Scout is not “called on to contradict ‘em. . . .” She also tells Scout that guests in her home should be treated guests, no matter how different they are. Calpurnia is trying to teach Scout to treat people equally, not on the basis of their wealth or lack of it. This foreshadows the lesson about race that Atticus will try to teach the town when he defends Tom Robinson.