The whole idea of ghosts is based upon the idea that there is some sort of spiritual entity that leaves our phsycial body upon death, taking our pysche and experiences with it. Since that is utter crap, I don't believe in ghosts.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell