Sometimes the billions of neurons firing in our brains help us concoct elaborate scenarios. We imagine ourselves with a dream girl or landing a dream job, an astronaut, rock star, or even an United States senator; but fantasies can turn dark. We start to believe there’s a monster under the bed or that evil forces are aligning themselves against us. All these fantasies, good and bad, stem from an evolutionary imperative. Our brains are exploring potential outcomes that might help us achieve our goals or avoid danger. But if we allow fantasy to overtake our thinking, we can miss the reality that’s right in front of us. And sometimes, reality’s not so bad.