In Romans 7, St. Paul says, "The law is spiritual." What does that mean? If the law were physical, then it could be satisfied by works, but since it is spiritual, no one can satisfy it unless everything he does springs from the depths of the heart. But no one can give such a heart except the Spirit of God, who makes the person be like the law, so that he actually conceives a heartfelt longing for the law and henceforward does everything, not through fear or coercion, but from a free heart.
Martin LutherUltimately, however, conflict lies not in objective reality, but in people's heads. Truth is simple one argument - perhaps a good one, perhaps not - for dealing with the difference. The difference itself exists because it exists in their thinking.
Martin Luther