I think this song is about the moment that two people break up.
Her eyes are empty as the sky: without any passion for him that she showed before (she isn't moved by staring at him like lovers are).
In both of them something dies, namely the love they felt for eachother.
I think the moment of tranquility is when they stare at eachother without feeling anything, without any emotions, just before she is breaking up with him.
That's as much as I can make it, keeping in mind the introduction: "What do you fear most in the world?" - "The possibility that love is not enough"
I think this song is about the moment that two people break up. Her eyes are empty as the sky: without any passion for him that she showed before (she isn't moved by staring at him like lovers are). In both of them something dies, namely the love they felt for eachother. I think the moment of tranquility is when they stare at eachother without feeling anything, without any emotions, just before she is breaking up with him.
That's as much as I can make it, keeping in mind the introduction: "What do you fear most in the world?" - "The possibility that love is not enough"