The whole movie is not about Time Traveling at all
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Archived from the IMDb Discussion Forums — Arrival
kevlee91 — 9 years ago(January 12, 2017 08:35 PM)
As many Denis Villeneuve movie before, this one was a hard watch. It doesn't have any actions, just purely scifi and require you to have an understanding of the theory of dimensions to appreciate the movie.
You should watch the video "TED-Ed - Flatland" on youtube to understand a bit about it first
For me, the movie was not about the Heptapods or Louise at all. It's an elegant explanation of "time", not as we knew it, but from the theorical standpoint of an 4 Dimensional being; That everything happened, right now or will happen is actually just one thing for a 4D beings, but we human as a 3D beings can only experience one part of it at a time.
That's why Louise experienced the thing she had in the movie. She DID NOT time travel, she essentially became the same as the Heptapod, experience both the slice of it and everything at one.
The Palindrome "Hannah" or the Circular nature of the 7pod language are some of the elegant explanation of this, they are both loops, no end, no beginning, it is just it.
Many will argue that time should not be fixed like this, but according to the theory 4D "time" is fixed, it is 5D and up that everything start branching out, becoming infinite possibilities.
Your opinions may differ, this is only my way of interpreting the movie.