A Ghost Story movie existentialism meaning

[ArasH]

Hello guys, 

No spoiler about the movie..

I have recently come across a movie named a ghost story that was unlike anything I have ever seen. The idea of death and what happens after we die is a key theme all over the movie. 

Besides the notion of eternal recurrence is also visible in the movie, an idea that I am a big fan of. 

Please watch the movie as it is the greatest film for people into enlightenment, and let's discuss the main idea, and specially the last scene,which is the most mysterious scene ever in a movie (something like inception).  

NOTE: IT IS NOT A HORROR MOVIE AT ALL.