Morning arrives here as a small injury rather than a relief. The speaker wakes to "a bit of hurt," and instead of welcoming the day, looks back toward the night. Like a raven, a bird often linked with darkness, they keep believing in the night "up above," as if it were still there behind the daylight, just out of sight.
The last line is the strangest and the most open. "So infinite a no body to look after" can be read a few ways. It might describe the night sky as a vast, empty presence with nobody to tend or care for. It might also hint at the speaker's own sense of being bodiless, or of having no one to look after them. The poem doesn't settle this.
The mood is quiet, lonely, and a little dazed. The short lines leave a lot of white space, which mirrors the emptiness the title names. There's sadness here, but also a stubborn kind of faith in something vast and dark.