Charles Fort explains his eerily marvelous theory that ours is a ghostly realm—that when spirits die they become human beings:
My suspicion is that we've got everything reversed; or that all things that have the sanction of scientists, or that are in agreement with their myths, are ghosts: and that things called 'ghosts,' are, because they are not in agreement with the spooks of science, the more nearly real things. I now suspect that the spiritualists are reversedly right—that there is a ghost-world—but that it is our existence—that when spirits die they become human beings.
I now have a theory that once upon a time, we were real and alive, but departed into this state that we call 'existence'—that we have carried over with us from the real existence, from which we died, the ideas of Truth, and of axioms and principles and generalizations—ideas that really meant something when we were really alive, but that, of course, now, in our phantom-existence—which is demonstrable by any X-ray photograph of any of us—can have only phantom-meaning—so then our never-ending, but always frustrated, search for our lost reality. We come up chimera and mystification, but persistently have beliefs, as retentions from an experience in which there were things to believe in. I'd not say that all of us are directly ghosts: most of us may be the descendants of the departed from a real existence, who, in our spook-world, pseudo-propagated. (Wild Talents