Dreaming and using your imagination are important for innovation and growth, as some of history's most famous ideas came from dreams, including the sewing machine, Beatles song "Yesterday", and Einstein's theory of relativity. While adults tend to become more realistic, dreams that may sound impossible can actually become possible in reality. The document encourages readers to write down their dreams, set goals, and take action to make their dreams a reality, as demonstrated by famous dreamers like Walt Disney.