" Here I had a strange idea not unworthy of de Selby. Why was Joe so disturbed at the suggestion that he had a body? What if he had a body? A body with another body inside it in turn, thousands of such bodies within each other like the skins of an onion, receding to some unimaginable ultimum? Was I in turn merely a link in a vast sequence of imponderable beings, the world I knew merely the interior of the being whose inner voice I myself was? Who or what was the core and what monster in what world was the final uncontained colossus? God? Nothing? Was I receiving these wild thoughts from Lower Down or were they brewing newly in me to be transmitted Higher Up? "

― Flann O'Brien , The Third Policeman