I want to draw your attention on a story by Japanese writer of the early twentieth century Kenji Miyazawa: "Night on the galactic railroad". Full of confidence I have, but I think the whole song is a reference to this work. May be after reading this short story will be easier to understand and the text itself. And it's not just in the night Express train that is hurtling through the darkness of the starry sky. The song and the story communicates something else, namely the theme of death and the human desires that aspire to the stars along with the souls which carries the express.
GriMnir - one who flies on the edge of the world.
GriMnir - one who flies on the edge of the world.