Just like the spine, every step towards igniting our passion is delicate. We work hard for our dreams; we make sacrifices. The fear of not being able to achieve it can significantly prevent us from doing so. We hold this burning desire for something but that fire doesn't reflect outside--blocked by fear. Us, humans, are able to dream but we are also the ones who have the ability destroy it.
Symbolism: The fire as the dreams we have in mind. The spine as the steps we take to achieve our dreams.