2. The priesthood of all believers: Luther taught that all Christians are priests and have direct access to God through prayer and the reading of Scripture. This undermined the authority of the Catholic priesthood and the hierarchy of the Church.
3. The authority of Scripture: Luther believed that the Bible is the highest authority in matters of faith and practice. He rejected the Catholic Church's tradition of relying on the authority of the pope and church councils.
4. Simplicity in worship: Luther simplified the liturgy of the Catholic Church, removing many of the ornate rituals and vestments. He also introduced congregational singing in the vernacular language.
5. Education for all: Luther emphasized the importance of education for all Christians. He established schools and encouraged people to read the Bible for themselves.
6. Marriage of clergy: Luther broke with the Catholic Church's tradition of clerical celibacy, allowing priests to marry.
7. New understanding of church authority: Luther believed that the true church consists of all those who believe in Christ, regardless of their denomination. He rejected the Catholic Church's claim to be the one true church.
These changes brought about by Martin Luther led to the start of a new form of Christianity, known as Protestantism.