What's worse than knowing? Not knowing?

I started writing this poem a month ago and its half finished status blocked me from writing anything else. So, today I've finished it.

The demon

Fear eats into the heart
Chomping through beating tissue
Till eyes that are red raw 
Doubt that she can trust you

Watch the darkening cloud
Sadness settling on her brow
What was a steady path
A blind man's stumble now

Hear the pain of her cries
As your vows evaporate
As the demon strolls in
On time, but far too late