Shipment of Theseus
One track, shape of a ring. No beginning, no end. I make the stops. Five hundred boxes on the train. No more, no less. Five hundred boxes at each of five hundred stops. Every stop, remove and add. Remove one, add one. Remove two, add two. Remove a hundred, add a hundred. Twenty-four miles from stop to stop. One mile, one hour. One day, one stop. The train has seen every stop before, will see every stop again. It has been moving as long as I have been alive, and I have never not been alive. The shipment is always the same. The shipment is never the same.