There are certain things that can not be explained. And then even if they are explained - you do not get the full explanation. You just get an answer to one question - but there are so many other questions that open up. One thing that is for sure, as our two main characters do not question certain things, you shouldn't either - you will likely have less fun, if you try to depict things that happen and the sense they may or may not make.
Yes even in the realm of the world the movie is playing in. There is not much dialog here, but the sound design and the cinematography make up for that - and for the movie being slow paced. You have to be into that sort of films to consider watching this. I had no idea what the movie would do - and I would say I was kind of shocked by certain reveals. But it does make sense - if you think of the beginning and where it ends. Even if you may have wished a different one ... just don't start asking ...
