“There’s a difference between brooding and sulking. Brooding is productive. When a man broods, he is thinking about how to solve his current crisis. Where did my plan go wrong? Who betrayed me? What can I do better next time, and who do I need to kill or maim—or whatever good people do to cheer themselves up—to feel better in the meantime? On the other hand, to sulk is to wallow in self-pity without considering any corrective actions. Why is the world a steaming pile of whale dung? Why is no one trustworthy? Does whale dung sink or float? Why do I keep trying?”