„Are you a ghost?“

— Rick Riordan
„Hazel frowned. "Why that one?""You don't see the ghost?" Frank asked."Ghost?" Nico asked.Okay… if Frank was seeing a ghost that the Underworld kids couldn't see, something was definitely wrong.“
— Rick Riordan
„Of all ghosts the ghosts of our old loves are the worst.“
— Arthur Conan Doyle
„So what, ghosts can't hurt you. That's what I thought then.“
— Stephen King
„we need ghost stories because we, in fact, are the ghosts.“
— Stephen King
„Not everybody believes in ghosts, but I do. Do you know what they are, Trisha?She had shaken her head slowly.Men and women who can't get over their past… That's what ghosts are.“
— Stephen King