I'm not a big poetry person but my problem with the piece is that I'm not sure what the 'darkest dawn' is, what the light is suppose to represent, why the light would be scary to the narrator, what "impulse of control so strong" is supposed to mean (control usually isn't an impulse unless it's to control something else and the line itself is worded very oddly), or what any of it has to do with fate or reality. I also don't get a sense of what risks they're taking (or who 'they' are).
In short, I don't know what any of this is supposed to mean. I don't know if it's just a lack of context since I don't know what inspiration you were using or what you were complementing when you wrote this, but I tried rereading it a couple of times and it just sounds like a group of unrelated sentences, some of which don't make sense on their own.
I would suggest outlining what the poem is supposed to be about and then trying to connect or expand the sentences to make the subject more cohesive and coherent. If you explain what you were going for, perhaps we can give further advice or suggestions on how to fix it up.