I believe when he says (as "it" wrote it "I have reached the end of the line and this time" he actually says "I am at the end of the line this time" Other than that it is easy to understand what the song is about. He has been stabbed in the back and will get revenge.
I believe when he says (as "it" wrote it "I have reached the end of the line and this time" he actually says "I am at the end of the line this time" Other than that it is easy to understand what the song is about. He has been stabbed in the back and will get revenge.