The huge bucket is symbolic for organized religion. The black little things are the people, looking up to the conceivable and complete aspects of religion, which is the bucket and the parts hovering above that symbolize the gods and real ideals, a touch above what is conceivable by humans, never touching it, hovering just above it. This, situated in a room with religious people. A closed space. Outside lies another world with no organized religion, an unknown space. And the door remains closed.