Heaven or Hell Lyrics
it's about someone who can't move on. and it hurts badly.
just like me, i can never move on after a disastrous break up.
I think that the line "For the pounding and calling at a door in your little chest" is referring to Revelation 3:20, which says "Behold, I stand at the door and knock; if anyone hears My voice and opens the door, I will come in to him and will dine with him, and he with Me."
I think it says "I pulled you out the way I fell in."
Anyway, in an interview, Jessica and Justin stated that this song was about their ups and downs in the music industry. They said it's about all of the people who were helping them leaving suddenly. And the part Aaron Marsh sings was written by him and sent to the band, so the bible reference sounds good to me.