Over the centuries, the passage filled with dust and dirt, and the horses seem to be walking on the original soil from their time rather than today's surface. The word live was not casually used. For something to move, it must also move through and exist in time. The numbered items above, particularly anger and humor, are attributes of living beings. The theory that ghost are images of the past doesn't make sense if ghosts can affect material objects in our world.
Most myths seem to have at least some factual basis.
Perhaps there is something to gargoyles and conjuring as in witchcraft. Gargoyles bear a resemblance to chupacabras, either of which may have a dimensional link. It is believed that ghosts have not crossed over to the other side. 1. where we are, three dimensional Earth 2. There may be types of ghosts.