'Judas' is a metaphor and an analogy about forgiveness and betrayal and things that haunt you in your life, and how I believe that it's the darkness in your life that ultimately shines and illuminates the greater light that you have upon you. … Someone once said to me, 'If you have no shadows then you're not standing in the light.' So the song is about washing the feet of both good and evil, and understanding and forgiving the demons from your past in order to move into the greatness of your future … I just like really aggressive metaphors — harder, thicker, darker — and my fans do as well. So it is a very challenging and aggressive metaphor, but it is a metaphor.

Lady Gaga Says 'Judas' Video 'Celebrates Faith' in MTV News (26 Apr 26 2011)