Hell Was Made in Heaven Lyrics

Lyric discussion by Solinus 

Cover art for Hell Was Made in Heaven lyrics by Helloween

This is an incredible head-banging, sing-along power anthem for the ages... but I have no clue what it means, aside from the assertion that "hell was made in heaven." This could be kind of literal, and mean that even Hell was made by God, or it could be a metaphor, for saying that evil can be born of good? Oh hell, I'm stumped. The lyrics seem to suggest some sort of merging is needed... "unite our fires" "I was made for you" etc...