I think the 7 has to do with 555 being man, 666 being the beast, and 777 being God, and perfection. I doubt that Manson believed this to be true, but used it because it's conventional and recognizable. Also, the 7 fits into the rest of the album.
It may also involve the wormboy coming to terms with his role as the antichrist superstar, and what that could mean for him and how people see him.
I think the 7 has to do with 555 being man, 666 being the beast, and 777 being God, and perfection. I doubt that Manson believed this to be true, but used it because it's conventional and recognizable. Also, the 7 fits into the rest of the album. It may also involve the wormboy coming to terms with his role as the antichrist superstar, and what that could mean for him and how people see him.