"weeping and moaning" = the sound of the souls of dead human beings, as the are tortured by the Devil in Hell.
"gnashing of teeth" = the vicious teeth of the Devil's demons attacking the innocent souls.
"champion sound, believe!" = the song suggests that the Devil is a true champion over God and that you should believe in his sounds and his teachings. And this is according to Matthew 25:30.
My Interpretation of Intro:
"weeping and moaning" = the sound of the souls of dead human beings, as the are tortured by the Devil in Hell. "gnashing of teeth" = the vicious teeth of the Devil's demons attacking the innocent souls. "champion sound, believe!" = the song suggests that the Devil is a true champion over God and that you should believe in his sounds and his teachings. And this is according to Matthew 25:30.