The solution isn’t to do away with dreaming and positive thinking. Rather, it’s making the most of our fantasies by brushing them up against the very thing most of us are taught to ignore or diminish: the obstacles that stand in our way.

So often in our day-to-day lives we’re inundated with advice to “think positively.” From pop music to political speeches to commercials, the general message is the same: look on the bright side, be optimistic in the face of adversity, and focus on your dreams. And whether we’re trying to motivate ourselves to lose weight, snag a promotion at work, or run a marathon, we’re told time and time again that focusing on fulfilling our wishes will make them come true.