 It is a terrifying dilemma to be in and to have to live with" (Becker, 1973, p. 26).Through the influence of Ernest Becker's writings, Rank's eternal dialectic between "life fear and death fear" has been tested experimentally in Terror Management Theory by Skidmore College psychology professor Sheldon Solomon, University of Arizona psychology professor Jeff Greenberg, and University of Colorado at Colorado Springs psychology professor Tom Pyszczynski.The American priest and theologian, Matthew Fox, founder of Creation Spirituality and Wisdom University, considers Rank to be one of the most important psychologists of the 20th century.