So now, turn from your conscience and its feelings to Christ, who is not able to deceive. My heart and Satan, however, who will drive me to sin, are liars. . . . You should not believe your conscience and your feelings more than the word which the Lord, who receives sinners, preaches to you. . . . Therefore, you are able to fight with your conscience by saying, ‘You lie. Christ speaks the truth, and you do not.’

Martin Luther, quoted in Paul Althaus, The Theology of Martin Luther (Philadelphia, 1966), 59.