Fate and destiny is a recurring idea in the story. Lyra is an excellent example of fate/destiny because she is constantly referred to as "more important than she knows." The reader knows that she has an important task in her future; possibly to save the world. Lyra is also destined to undo the evils done by her parents, and, because she is their daughter, is the only person who can do so. The alethiometer verifies the theme of fate because it accurately foretells the future. Therefore, the future is unchanging: the very definition of fate.