The three basic principles of Protestantism are that Scripture is the only source of spiritual authority, salvation only comes from faith, and priesthood of the believer. The idea of Scripture being the only source of spiritual authority differed from Catholicism due to the fact that the Catholic Church believed that tradition was equal to spiritual authority. Also, the Catholic Church believed that salvation comes through human works as well as faith. The Protestant principle differed from the Catholics by stating that salvation only comes from faith. Lastly, the Protestant principle that priesthood belonged to the believer also contrasted the Catholic Church. Priesthood of the believer has three distinct ideas. The ideas are that the believer
