Warning, wall of text incoming.
You have been warned.
There's a lot of things here in this poem and I think lots of people will see this poem differently. At a surface level the poem is about the two parts of one's being; I am assuming the existence of a soul for the purpose of this conversation. The soul and the body do not see eye to eye, they do not understand each other and wish to part. They believe they have it harder than the other having to endure the consequences the presence of other generates. As Elise noted, the body feels the pulls of the soul's emotion, and the soul feels controlled by the body, afflicted by it's humanly diseases. Thinking deeper though, it seems the both want the same thing: death. Not only do these two elements want to part, but they wish for the death of themselves. Here, the body, questionably, suggests that without the presence of the soul, it would be able to peacefully die. The body states that it doesn't want to live in the first place. Later down where I highlighted the lines "only to endure... the cure", the soul echoes this desire, stating that the pain from being afflicted by disease is no comparison to the pain of knowing it must go on living, as the body produces a cure. Why can't these two get along and mutually kill themselves? If they hate it so much, why not end it as they very blatantly want to do. Slight tangent to this, the body asserts that without the soul it would die, saying the soul "MADE me live". Assuming that the soul is the source of emotion as asserted in the last stanza, the body contradicts itself slightly, as it says without the soul's emotion, it would never exist. I personally believe it is possible to live without feeling emotion, and might even be better, so it surprises me that the body claims it's existence is only relevant because of the soul's presence. Maybe the intent all along was to question the notion of existence in the first place, and the inherent contradictions that accompany it.
But then again... that's all speculation.