Luther taught that salvation and subsequently eternity in heaven is not earned by good deeds but is received only as a free gift of God's grace through faith in Jesus Christ as redeemer from sin and subsequently eternity in hell. His theology challenged the authority of the Pope of the Roman Catholic Church by teaching that the Bible is the only source of divinely revealed knowledge from God and opposed sacerdotalism by considering all baptized Christians to be a holy priesthood. Those who identify with these, and all of Luther's wider teachings, are called Lutherans.
His translation of the Bible into the vernacular (instead of Latin) made it more accessible, which had a tremendous impact on the church and on German culture. It fostered the development of a