The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man.
attributed to George Bernard Shaw
Elkington, John, and Pamela Hartigan. The Power of Unreasonable People: How Social Entrepreneurs Create Markets That Change the World. Boston, MA: Harvard Business School Press, 2008.
(Note: Elkington and Hartigan cite Shaw’s Man and Superman as the location of the Shaw quote.)