" Dulles was fortunate to find someone like Mary, a woman whose morals were conveniently flexible—or, as she herself put it, a woman with a “sophisticated point of view.” She had a curious way of explaining her moral dexterity, but Dulles certainly would have endorsed her way of thinking. “In order to engage in intelligence work successfully,” Mary observed, “it was essential to have a very clear-cut idea of your own moral values, so that if you were forced by necessity to break them, you were fully conscious of what you were doing and why. "

― David Talbot , The Devil's Chessboard: Allen Dulles, the CIA, and the Rise of America's Secret Government