2001 was written in an age which now lies beyond one of the great divides in human history; we are sundered from it forever by the moment when Neil Armstrong and Buzz Aldrin stepped out on to the Sea of Tranquility. Now history and fiction have become inexorably intertwined.
As quoted in "Writer Arthur C. Clarke Dies at 90" by Ravi Nessman in the Associated Press (18 March 2008)