Joseph Murphy, PhD., D.D., has been acclaimed as a major figure in the human potential movement, the spiritual heir to writers like James Allen, Dale Carnegie, Napoleon Hill, and Norman Vincent Peale, and a precursor and inspirer of contemporary motivational writers and speakers like Tony Robbins, Zig Ziglar, and Earl Nightingale. He was the Minister-Director of the Church of Divine Science in Los Angeles for almost three decades and the author of numerous books that have sold tens of millions of copies in dozens of translations throughout the world.