Mikael is always paying little "tributes" to bands that he likes throughout all his albums. In Atonement, as soon as I heard the song the first time when it first (GR) came out, I instantly knew the guitar line was the same as a melodic lyric line from a Heart song The Night. And on Beneath the Mire, when he says "in emptiness", he's paying tribute to his vocal idol Dave Vincent. He's not the first to do these things.