I believe that GP is referring to the idea that objects are moving at a constant velocity in space-time. In that model, things that are moving rapidly (from our

I believe that GP is referring to the idea that objects are moving at a constant velocity in space-time. In that model, things that are moving rapidly (from our perspective) in the 3-space of, ummm, space, are moving slowly along the time axis of space-time (think of photons moving at the speed of light, but where the velocity along the time-axis is slowed to 'zero') and things moving slowly in space (like us!) are really booking it along the time axis of the space-time 4-space.