Universal priesthood (doctrine)
The first person who spoke about this was Martin Luther. Luther did not use the exact phrase "priesthood of all believers". He says that there is  a general priesthood in Christendom in his 1520 To the Christian Nobility of the German Nation. In this text, he also dismisses the medieval view that Christians in the present life were to be divided into two classes: "spiritual" and "secular". He put forward the doctrine that all baptized Christians are "priests" and "spiritual" in the sight of God: