"Discernable differences can be found in writings from various Christian traditions; great theologians or historical movements establish patterns that persist. Examples: the use of natural law in the Roman Catholic tradition; the distinction between law and gospel and between the heavenly and earthly realms in the Lutheran tradition; the emphasis on following Christ as he is portrayed in the Gospels and on rigorous obedience to his teachings in the Radical Reformation; [and] the marked mystical aspects of ethics in the Eastern Orthodox tradition."