The Magic of thinking Big About the Author DR DAVID J SCHWARTZ was a world-renowned motivational speaker and personal development expert. Born in the United States in 1927, he went on to be a professor at Georgia State University, and later founded his own consultancy firm, Creative Educational Services Inc.CES Inc. specialised in leadership development and life strategy, subjects which Swchartz went on to write several highly-acclaimed books about. He passed away in 1987.