I'm not sure I'm able without sounding like a complete fool or a madman.
However, since you're new, you'll eventually find yourself coming across people updating, discussing their dreams. These dreams are so vivid in detail, they seem as they are real, and having had these dreams myself, I can vouch for that. But these dreams are different. Many people seem to share the same dream, as though they were remembering an incredible past. And then... some times...