"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… Even the United States senator. But fantasies can turn dark. We start to believe that 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."Perception 1x10 - Light.