It could be said that this poem is about Native Americans, who are referred to "The Noble Savage" (option1). It portrays the spirit the Natives haunting their graves in the North American wilderness. It might be considered and American example of the Romantic movement.
that cannot be cured must be endured.
That cannot be cured, must be endured.
^ capitalizing T in that^ adding a comma after cured to let the reader know enduring is a second/different act.
Not wanting to do anything. even little things like getting out of bed, showering, eating, just basically being human. as well as losing all interest in everything you used to really enjoy doing.