It's fairly obvious to say this song is about loving someone and having all your walls come down but it's a bit more than that.
I think he's saying that the walls come down slowly and in pieces and with great force and explosions. That sometimes, you have to get your heart torn out before you realise that you have walls and that they are a detriment. Sometimes you need your heart dragged out of them like a king with his kingdom sacked and burnt to the ground before you can move forward.
It's fairly obvious to say this song is about loving someone and having all your walls come down but it's a bit more than that.
I think he's saying that the walls come down slowly and in pieces and with great force and explosions. That sometimes, you have to get your heart torn out before you realise that you have walls and that they are a detriment. Sometimes you need your heart dragged out of them like a king with his kingdom sacked and burnt to the ground before you can move forward.