Lyric discussion by Crujebsul 

Cover art for Atonement lyrics by Opeth

First verse seems like he's come "down to Earth" ("Cleared the fog that was veiled around me and blurred my sights") and realising what he was doing was wrong. He doesn't feel the need to carry out what he promised to do for Satan ("Suddenly I'm no longer aching to honor my plights"). For those of you who don't know, a plight is a promise of some kind (I think...).

Although in the second verse, as percussivemassacre said, it seems to relate to a werewolf. Hmm.