That clicks with the body of understanding that exists about Neolithic mysticism. Primal man doesn't distinguish between psychic and tangible stimuli. Another example would be the idea of curses -- Grug misses his javelin throw, hits Lug, sees how Lug's family hates him, and never seems like himself again? He's not burdened with guilt: Lug's family harnessed magic to ail Grug for the rest of his life. All that said, pretty much every culture still believes that at some level. It's an abberation of post-Enlightenment Europeans to qualify psychic stimuli as less than others. <|endoftext|> A ghost is actually a psychic construct made up of the thoughts and memories of the people that knew or heard of them. As such, people recently deceased tend to be more 'solid' in their appearance and action, while people who've long since passed are more ethereal and malleable in form. Once only a few people are aware of someone's existence, they become part of the spiritual energy that allows ghosts to exist. Grug the Caveman was essentially the 'battery' that powers the modern ghosts. 