Human Nature as Basis for Morality

How a Christian lives in this world is an important question to study. Is truth a theory or a reality? If a Christian says he or she believes in Christ and has faith that His promises are in fact true and are fulfilled, and does not live according to the gospel, then how is that person (and others) to make sense of the practice of Christianity in the reality of life? Natural law, morality's origin, conscience, free will and freedom are among the many topics explored here.