What characteristics does Atticus say that are shares by the common folk

Atticus will not let his sister convince his kids that the Finch family is of aristocracy or special. He says that the Finches are members of the "common folk" of Maycomb. “Let us leave it at this,” said Atticus dryly. “You, Miss Scout Finch, are of the common folk. You must obey the law.” Atticus wants his children to know that they are no "better" than their friends and neighbors even though Atticus is the most educated man in town.