If we believe in magic, we'll live a magical life.
Think of all your experiences as a huge tapestry that can be laid out in whatever pattern you wish. Each day you add a new thread to the weaving. Do you craft a curtain to hide behind, or do you fashion a magic carpet that will care you to unequaled heights?
If we believe in magic, we'll live a magical life. If we believe our life is defined by narrow limits, we've suddenly made those beliefs real.