I think this song is about God. I think that he's basically saying how he realized who he was and didn't like it. He's asking God to hold the door (being the gates of heaven) open for him; dispite who he was. He realizes that who he was almost caused him to lose You (being God). He states that he doesn't want to drive, he wants Him to keep driving. Living his life with God in control.
That's just my opinion.