“It is pure invention that pope, bishop, priests and monks are to be called the ‘spiritual estate’ while princes, lords, artisans, and farmers the ‘temporal estate.’
This is indeed a piece of deceit and hypocrisy. Yet no one need be intimidated by it, and for this reason: all Christians are truly of the ‘spiritual estate,’ and there is no difference among them except that of office.”
-Martin Luther, Three Treatises