Both poems suggest a form of life after death that should not be feared.
These two poems deal with a similar subject matter, which is the idea of death and the afterlife. However, they both approach the subject from a slightly different perspective. In the case of Whitman, he refers to death simply as a return to earth. For him, death holds spiritual meaning due to the connection of humans to the environment. On the other hand, Dickinson talks about an "afterlife" more concretely, as she thinks of it as a spiritual rebirth.
the narrator closes the lantern tightly so the old man is
not awakened by the bright light