"The Role of Mathematics in the Sciences and in Society". John von Neumann's address to Princeton alumni (1954) as quoted in "John von Neumann: Collected Works" edited by A. H. Taub, 1963.
Wallace D. Wattles (2015). “The Science of Wallace D. Wattles: The Science of Being Well, The Science of Getting Rich & The Science of Being Great – Complete Trilogy: From one of the New Thought pioneers, author of How to Promote Yourself, New Science of Living and Healing, Hellfire Harrison, A New Christ, How to Get What You Want and Jesus The Man and His Work”, p.23, e-artnow