This continuing presence of the weird in literature shows the popular demand for it and must have some basis in human psychosis. The night side of the soul attracts us all. The spirit feeds on mystery. It lives not by fact alone but by the unknowable, and there is no highest mystery without the supernatural. Man loves the frozen touch of fear, and realizes pure terror only when touched by the unmortal. The hint of spectral sounds or presences quickens the imagination as no other suggestion can do, and no human shapes of fear can awe the soul as those from beyond the grave. Man's varying moods create heaven, hell, and faery wonder-lands for him, and people them with strange beings.