" Yet, despite all, it is a difficult thing to admit the existence of ghosts in a coldly factual world. One's very instincts rebel at the admission of such maddening possibility. For, once the initial step is made into the supernatural, there is no turning back, no knowing where the strange road leads except that it is quite unknown and quite terrible. ("Slaughter House") "

― Richard Matheson , Collected Stories, Vol. 2