I really don’t know how I quite feel about this one. It could, to me, pull into two seperate theories, or be a collaboration of them both. Who knows? I’ll start off with the first one then.
Sirius is back to reality and the Hull closes once more. It is here, sitting with his back to the cold steel door that he starts to reflect on the choices he’s made and sees the hurt he has caused to his dear Mary. Still, He questions her love for him (“Were you on my side?”), and then kinda mocks her for doing what she did (“You gave it once, a lesson that you thought, you could teach it when you want, Subtract me from your heart”). Sirius keeps up this sort of pity party as he keeps reflecting on his choices, going back and forth between love and hate (“We accept, We unaccept, We break up, We made up.”) almost like a “She loves me, she loves me not” type moment in my eyes. Finally he has enough of it and decides to move on from the subject knowing that his work won’t be finished sitting around like this. (“Misery, I digress, No recourse, No remorse. Let it be, I confess to every song that brought you back”). Now the song ends and thus does Theory One.
Theory Two: This one is pretty much the same as Theory One with a few twists. Instead of mocking her for doing what she did, Sirius praises her in a way knowing that the only way to cure the pain is to Subtract himself from her life. This ties into the ending with him so down on himself that he doesn’t take the end bit happy and keeps working, instead he agrees that he needs to not only Subtract himself from Mary’s life, but The World right now as a whole and enters into some sort of Cryogenic Sleep or whatever. Personally I think Theory One is the one I want to go with, but a friend suggested this theory and I like it as well. It would be interesting for it that this is the case and it ties into the next album with Sirius waking up and continuing his work. We’ll just have to wait and see with the opening track!