It's probably no surprise that I enjoyed this more than reading Augustine or Aquinas; you can really see some of the radical elements that will come to shake the Western world in this text. There were a few things I learned about Luther's ideas from this text that were new to me. For instance, this call for the princes to oppose the church and call a new council is clearly contrary to everything I've been told about how Luther only wanted to "reform" the Church. True, the reformation he is calling for is not a call for schism, but it also demands far more than mere reform. What it actually calls for is the abolishment of the Roman Catholic Church, the dethroning or even killing of the Pope, the re-founding of a new church in its place with a new internal organization and set of rules, and a new relationship between political and religious authority (including subjecting church officials to criminal sanction when they violate the law, up to and including the Pope). To say that he sought only "reformation" gives him scant cover when he's saying the Pope is the anti-Christ, commenting on killing 20 Popes being better than their own lives of unrepentant open sin, and calling for the German nobility and all of the "heretical" sects to unite to take a stand against the "tyrannical" Church economically and militarily. Moreover, I didn't realize how fundamental priestly chastity was to the property relations of the Church, and thus how radical Luther's call for allowing priests to marry really was. Finally, I didn't realize how deeply embedded the ideas of spiritual freedom, self-determination, and even democracy were in his thought. It's one thing to affirm the priesthood of all believers over the interpretive supremacy over the Church, which clearly challenges only Church authority; but he also calls for the right to defy any power, papal or imperial, actively rather than just passively. There are clear political implications to his affirmation of our God-given liberties and right to resist tyranny, and even if he doesn't explicitly draw them out, I can certainly see how this presages later thinkers and why the German nobility might be concerned by some aspects of his work even if they were pleased by other aspects. On that note, it seemed a little imprudent to criticize the nobility if his goal was to actually win them over, but I suppose he couldn't let that go as a man of principle standing against the political realists of his day.