20240730 what is time (2) ?

 - think about a movie. if it is a 60 mins movie. 

- when we are watching the 30th min, we are in the middle of the movie

- before the 30th min, it is the past, after it is the future.

- but

- a 60 mins movie is filmed and all the content is already in the film.

- the beginning and the end of the movie already filmed

- when we watching the 30th min, the end also been filmed which mean that we already know the ending

- if some people watching the ending at the same time we are watching the middle. so, he knows the ending ahead