Gary E.R. Schwartz is a professor of psychology, medicine, neurology, psychiatry, and surgery at the University of Arizona and director of its Human Energy Systems Laboratory. After receiving his doctorate from Harvard University and teaching there, he served as a professor of psychology and psychiatry at Yale University, director of the Yale Psychophysiology Center, and co-director of the Yale Behavioral Medicine Clinic. He lives in Tucson, Arizona.
Deepak Chopra, M.D., is the best-selling author of "Ageless Body, Timeless Mind," "The Seven Spiritual Laws of Success," & many other books.