The Station of Sacrifice is also known as the Station of Change. You free yourself, cut loose something that was holding you back, give up your needless compassion, or your love for your mentor, or your crippling self-doubt. You become a stronger person and gain mystical power through leaving your weaknesses behind you.
The Station of Rot is also known as the Station of Inversion. You twist something about yourself, turning fear of your homeland's rulers into contempt, or hatred of the Dead into quiet love, or devotion to your religion into detestation. You become a stronger person and gain mystical power through inverting your weaknesses into strengths.