“Time is said to be irreversible. And this is true enough in the sense that ‘you can’t bring back the past,’ as they say. But what exactly is this ‘past?’ Is it what has passed? And what does 'passed’ mean for a person when for each of us the past is the bearer of all that is constant in the reality of the present, of each current moment? In a certain sense the past is far more real, or at any rate more stable, more resilient thant the present. The present slips and vanishes like sand between the fingers, acquiring material weight only in its recollection.”— Andrei Tarkovsky, from “Imprinted Time,” Sculpting in Time, trans. Kitty Hunter-Blair (University of Texas Press, 1987)