The story presents a fixed series of events, which includes a man disappearing at one point in the future and (from his point of view) reappearing at the start of the story to then interact with himself, his own wife, and the evil alien.
It’s nice that there’s no talk of the universe exploding when he meets himself, but even so, the story suffers from a murkiness that is often part of time-travel stories that are otherwise enjoyable. The murkiness stems from two points: (1) That somehow the events are repeating over and over again—but from whose viewpoint? (2) The events are deterministic and must be acted out exactly the same each time. I enjoy clever stories that espouse the viewpoint of the second item (“By His Bootstraps”). But this does not play well with the first item, and (as with many stories), Harness did not address that conflict nor the consequent issue of free will. Still, I enjoyed the story and wish I’d met Harness when I traveled to Penn State University in the spring of 1982.
Space and Time are commensurable. To explore the universe by seeking knowledge of points in Space can be accomplished only through Time; and in order to measure Time quantitatively, we refer to Space intervals on the dial of a chronometer. Space and Time, being of the same nature, may be conceived of as different physical states of the same substance, or as differ ent modes of motion.
