I don't think they were going for a specific meaning, or if they were they don't keep to it. Probably just got an idea and started writting, letting it develop on its own. Most songs don't really make that much sense, they just write the lyrics however it sounds good, even if it goes against what the meaning of the song is suppose to be. Pretty much all mainstream bands do, that's why I would take Cradle of Filth over Avenged any day :)