I watched the movie after going through some reviews (without spoilers) but kind of had the idea it was about mother nature and God. But once I completed watching the film, I have a totally different perspective now.
I found it to be the slow war between our mind and heart. The man being the mind, and the woman the heart. Our mind always seeks validation from external factors. We allow people to take advantage of us, more than they should. And our heart knows it is hurting and that if something/someone hurts us, they should be limited and thrown out. Our heart tries to unite with our mind and heal us. But at the end, mind wins.
People create a chaos out of our lives, and after a point our heart cannot take it and it just metaphorically dies. So the person within us dies and will be reborn, but we'll not be the same person again. We're just a new character in our own story, where our brain still manipulates our heart into impressing people and the cycle repeats.
There's a dialogue in the movie where the male lead says, they love it(his book/poem) but they all understand it differently (not the exact words from the movie's dialogue, but the gist is this) so the director basically says each viewer interprets his movie differently and that's ok.
I am just in awe, still processing all the information the movie has depicted. My only regret is i didn't watch this earlier.