High Quality Content by WIKIPEDIA articles! In Protestant Christianity, the relationship between Law and Gospel—God`s Law and the Gospel of Jesus Christ—is a major topic in Lutheran and Reformed theology. In these traditions, the distinction between the doctrines of Law, which demands obedience to God`s ethical will, and Gospel, which promises the forgiveness of sins in light of the person and work of Jesus Christ, is critical. It is used as a hermeneutical principle of biblical interpretation and a guiding principle in homiletics (sermon composition) and pastoral care. It is the supersession of the Old Covenant (including traditional Jewish law, or halakha) by the New Covenant and Christian theology.