In World War 2, you could help to hide Jews in a sort of sewer. The Government keeps tracks of most Jews, yet you could attempt to hide people, or at least give water, food, or a safe place. It may bring yourself to death back then, yet it would have a possibility to save at least some Jews.
Answer: The theme of Cinderella as told by the Brothers Grimm, is that if you have faith and are true to yourself, you can eventually get what you want.