I sometimes have this nightmare. I "wake up" in the dream and I float in the middle of black nothingness, realizing that whole my life was a hallucination or something I made up, none of it was ever real. I am there, floating and there is literally nothing. (or alternativelly I fishing reading book of my life... and I don't know who I am. I know I am not person i read the book about though).

Because nothing does exist in the universe, in places where the stars are too far away to give light...

That is how it feels at times.