all things change, and before long they are gone. You cannot step into the same river twice, Heraclitus once said, because new waters are constantly flowing through it. Nature herself is a rushing torrent, just like the Danube, sweeping along all things in her stream. No sooner has something come into existence than the great river of time washes it away again, only to carry something else into view. The long-forgotten past lies upstream from me now, and downstream waits the immeasurable darkness of the future, vanishing from sight.
