The real sting here isn't that comfort and profit are opposites—most people know that already. Rather, Arnott is pointing out that our emotional ease becomes an *active liability*, a false signal we've mistaken for wisdom. When an investment feels safe, it's often because everyone else thinks so too, which means the price has already climbed to reflect that safety; when something feels uncomfortable, it's frequently because you're seeing value others have overlooked. A concrete example: in 2008, holding cash felt terrifying (everyone was losing everything), yet those who could stomach the discomfort of sitting on the sidelines while markets crashed found themselves with tremendous purchasing power when prices bottomed out.