Time is like a river, flowing endlessly through the
universe. And if you poled your flatboat in that river, you
might fight your way against the current and travel upstream
into the past. Or go with the flow and rush into the future.
This was in a less cynical time before toxic waste dumping and
pollution filled the waterway of Chronus with the detritus of
empty hours, wasted minutes, years of repetition and time that
has been killed.
-- Harlan Ellison