“This lack of symmetry leads to speculating that a presence, analogous to the Aether, flows through time, as the Aether flows through space. The assumption of a Vacuum in time tended to cut us off one from another. But an Aether sea to bear us world-to-world might bring us back a continuity, show us a kinder universe, more easygoing...” 
― Thomas Pynchon, Gravity's Rainbow