This is basically about a guy who has to hide behind a mask every day, like fake a smile and whatever, and he hates having to hide that. But when he has those drugs and alchohol he doesn't have to hide anymore, he can take off that mask and lost the fake smile to reveal how he really feels. The alchohol makes him feel alive, reminds him that he actually exists in the world.
A light to burn all the empires.
So bright the sun is ashamed to rise and be.
In love with all of these vampires.
So you can leave like the sane abandoned me.
These are very complex lyrics, like most of mcr's. I agree with out of order, I think it means like someone who would usually look down on you helps you, but isn't happy about it. "in love with all of these vampires" like theyre helping the "vampire" as in the one they don't really like or approve of. And then the "so you can leave like the sane abandoned me" part (this part speaks so much to me its not funny) this part is like I know you don't love me. And I've already lost my mind, so you can stop trying.
This might be completely off track but it's what I took of it. Amazing lyrics.