Just very deep and powerful. I see the Genesis and Zero refferances/similarities as the others wrote but really at it's core this song is about someone who's slipped beyond the line of humanity, who fears what they've become. The know that they crave this thing that pulls them firtuer from humanity yet they are pained because someone still part of humanity was so dear to them. They don't want to drag that person down with them, and the only person that they feel can save them, is the person they cared about. Because despite the 'inhumanity' that has afflicted them they know they can't hurt that person and so want this person to end them, to make sure they never degenerate to the point they hurt this precious person.