Attributed to Szent-Györgyi in "Bridging the Present and the Future: IEEE Professional Communication Society Conference Record, Williamsburg, Virginia, October 16-18, 1985", p. 14, 1985.
Denis Waitley, Dayna Waitley, Deborah Waitley (1999). “The Psychology of Winning for Women: What Every Woman Needs to Know, what Every Man Needs to Understand”, Executive Excellence Pub