this song to me seems to be more about someone who knows he's dying physically (or maybe he isn't, could go both ways), and feels like he has a deeper sickness. he knows there's a cure for his sickness ("...chest of remedy", "...my cure lies", "deliver my soul from the sword"), but for some unexplained reason he believes that the cure is unattainable ("left me with no key to unlock the chest of remedy", "no Christ to end this war", "higher than hope my cure lies"). and so giving up hope of being cured, he relenquishes himself to death.
this song to me seems to be more about someone who knows he's dying physically (or maybe he isn't, could go both ways), and feels like he has a deeper sickness. he knows there's a cure for his sickness ("...chest of remedy", "...my cure lies", "deliver my soul from the sword"), but for some unexplained reason he believes that the cure is unattainable ("left me with no key to unlock the chest of remedy", "no Christ to end this war", "higher than hope my cure lies"). and so giving up hope of being cured, he relenquishes himself to death.