The man took off his dark, stained hat and stood with a curious humility in front of the screen. "Could you see your way to sell us a loaf of bread, ma’am?"
– John Steinbeck
The Grapes of Wrath, Chapter 15. The theme of loss of dignity is shown here. A migrant farming family with children feels a sense of shame when the only food they can afford to buy at the diner is a loaf of bread.