“The past is a distant, receding coastline, and we are all in the same boat. Along the stern rail there is a line of telescopes; each brings the shore into focus at a given distance. If the boat is becalmed, one of the telescopes will be in continual use; it will seem to tell the whole, the unchanging truth. But this is an illusion; and as the boat sets off again, we return to our normal activity: scurrying from one telescope to another, seeing the sharpness fade in one, waiting for the blur to clear in another. And when the blur does clear, we imagine that we have made it do so all by ourselves.”