Using the Power of Spirit to Create Health, Prosperity, and Happiness Paramahansa Yogananda’s life changing book invites us to use the power of spirit to create health, prosperity and happiness. Filled with sensible down-to-earth wisdom, The Law of Success explores the spiritual sources of creativity, positive thinking, and dynamic will, as well as the success-producing power of self-analysis and meditation. It shows how each one of us can naturally attract happiness and harmony.