Now. I looked at this picture very exactly in the full size view. The background is very soft and dark. That is an atmosphere such as on a painting of Caspar David Friedrich. The beautiful girl is gilded of the spark of the fire how. A golden sun in a blue Moonnight. The idea is classicly and romantic. But the fire produces worry and fear. In that alone its longing is. In the longing after the other person, anxiety is. Fear of the burning. Your picture is a perfect mathematical equation in art.