On the television show Ally McBeal the characters had theme songs. The songs were supposed to reflect how they lived their lives, or maybe how they would have liked to live their lives. Most of us don't have theme songs, but we often have metaphors for our lives that either help us or hinder us.
Some people see life as a battle. Every encounter is a struggle, and if they don't win, they feel like they have lost. Others view life as an adventure. A new day brings new opportunities to explore. If something goes badly today, there's always tomorrow.