The phrase "the world itself is a bad dream" appears to be linked to various creative works and themes, including literature, film, and video games. It is referenced in discussions about authors such as Sylvia Plath and her novel "The Bell Jar", as well as in reviews of games like "Little Nightmares 3" and "Bad Dream: Fever". The phrase may also be connected to the concept of nightmares and their effects on the brain, although the exact nature of these connections is unclear.