Catholic Church is a religion where the Bible is the truth and the Pope the government that rules with faith. Luther and Erasmus were against the Catholic Church beliefs, the Bible shouldn't be the scriptural truth and salvation shouldn't be bought. These beliefs came to the result of a new religion, The Protestants.
Protestants take away the authority of the Bible and give a bigger meaning to "The belief of Jesus Christ" the only thing that a Protestant needs to do is believe in the Jesus Christ and the beliefs of the crucifixion are more than enough.