" From the start, the German princes who supported Luther were not going to allow themselves to be exploited or commanded by religious leaders again. Henceforth, they would rule both Church and state. In this they were vigorously supported by Martin Luther, whose ‘advice to the German princes who embraced Protestantism was that they compel their subjects to submit to religious instruction and allow them to hear only authorized preachers’. "

― Rodney Stark , Reformation Myths: Five Centuries Of Misconceptions And (Some) Misfortunes