Motion is either continuous or not. Either way, it is a simply remarkable thing.
Continuous: There is no first or last motion. All that is moving has moved and will move. Nothing is moving that has not already been in motion; and all in motion will be in motion. Motion is always between two terms. Trying to find a motion that has not been moving is like trying to find the next real number after 2, or the last real number before 2.
Discrete: no moving subject moves, for there is no subject, just as there is not one moving subject on a shelf of books where each book is annihilated one after the other. Strictly, there would be no “after” since this presupposes one thing that holds itself in the same way before and after.In fact, this would be a denial of motion.
Observation confirms the idea that motion is continuous. Observations can be more or less elaborate, but we are still speaking about something we are observing.
But if motion is continuous, and is therefore always between two terms, then the existence of motion requires the existence of its terms. What kind of temporal existence do they have? If the terms do not exist now, there cannot now be motion; but if the terms exist now, then how are they before and after in time, which is the only way we are interested in them? We easily imagine time lines, but time can’t be a line. In fact, a time line is as much a contradiction as square circle! it requires that something be at all at once (like a line) which by definition cannot be at once (temporal succession).
But if a time line is a contradiction, how is motion- as temporal- possible? Better yet, what is necessary if motion exists?