That sentiment, and the scene containing it, really captures what this film is trying to say — at least in my view. For me, the movie isn't primarily about being taken against one’s will and confined; instead, it explores a sense of futility regarding existence itself, and the process of accepting that any significance we discover must originate from within ourselves. It also deals with themes of progression, affection, and family ("Can I?" "There's nothing left."), as well as broader ideas concerning people and love. It brought to mind the lovely bond between a father and his son in *The Road* (the novel — I don’t recall if the film version does justice to this connection, but I do remember how moving it was in the book). The portrayal of the mother-son relationship here is equally poignant. I also can't think of another time when a child has acted so effectively on screen. I suppose there have been instances where performances were superior, but I honestly can’t recall any others that impressed me quite like this one did. Going in, I expected something scary (I avoid summaries and reviews before seeing a film), but what I experienced was being brought to tears repeatedly. And certainly not feeling let down by it. Wonderful. You should see it.

Source on TMDB