A Tyranny of Souls Lyrics

Lyric discussion by RainbowDemon 

Cover art for A Tyranny of Souls lyrics by Bruce Dickinson

There's a very obvious reference to MacBeth in here. The first stanza is the intro to the play, with the three witches talking amongst themselves.

I don't know if the song is specifically about MacBeth, or more of the way power can become like a drug and control every aspect of one's life.