How do you know that for sure? What happens to your brain when you sleep? Do you even know where it goes? What energy it taps into? Nobody knows. I understand you said dreams are not reality, but what if when you dream, you tap into something that could be a glimpse of something? My Dad once had a dream of one of his close friend from childhood. In the dream, they were talking to each other. Dream was vivid, Dad said. Do you know what happened to my Dad's friend? Few days after the dream, my Dad and my Mum was talking to each other, and my Mum went to call my Dad's friend. His family said he passed away a few days ago. It just happened to be the same night my Dad and his Friend was talking to each other in my Dad's dream. What does it mean? To me, it looks like my Dad's friend's spirit contacted my Dad in his sleep. I know this sounds too far fetched, but logically, you can't dismiss it because you think it's just a dream.