" Imagination is not fragile. It feeds off flaws, difficulties, and problems. Insulating ourselves from failures—whether via brainstorming guidelines, the familiar cultural taboo on criticism, or the influence of cognitive dissonance*—is to rob one of our most valuable mental faculties of fuel. “It always starts with a problem,” Dyson says. “I hated vacuum cleaners for twenty years, but I hated hand dryers for even longer. If they had worked perfectly, I would have had no motivation to come up with a new solution. But more important, I would not have had the context to offer a creative solution. Failures feed the imagination. You cannot have the one without the other. "

― Matthew Syed , Black Box Thinking: Why Some People Never Learn from Their Mistakes - But Some Do