How did Luther express his concerns to the church? What was the result?

Luther didn't like the fact people could buy indulgences - or reduced punishment after death ... If you don't know what indulgences are, the Catholic Church's definition is a good place to start: "An indulgence is a remission before God of the temporal punishment due to sins whose guilt has already been forgiven."

His writings were responsible for fractionalizing the Catholic Church and sparking the Protestant Reformation. His central teachings, that the Bible is the central source of religious authority and that salvation is reached through faith and not deeds, shaped the core of Protestantism.