"The Romanists have, with great adroitness, drawn three walls round themselves, with which they have hitherto protected themselves, so that no one could reform them, whereby all Christendom has fallen terribly. Firstly, if pressed by the temporal power, they have affirmed and maintained that the temporal power has no jurisdiction over them, but, on the contrary, that the spiritual power is above the temporal. Secondly, if it were proposed to admonish them with the Scriptures, they objected that no one may interpret the Scriptures but the Pope. Thirdly, if they are threatened with a council, they pretend that no one may call a council but the Pope."

Martin Luther, Address to the Christian Nobility of the German Nation Concerning the Reform of the Christian Estate, published August 1520. One of three major reforming treatises Luther published that year.