I came across this recent post over at Catholic Answers:
What are the contexts and primary sources of the infamous Luther quotes?
We've probably just about all seen some of the infamous Martin Luther quotes flying around the Internet. "Sin boldly," "Christ committed adultery," etc. I'd like to ask the Protestants, Catholics and anyone else here with information on this for the ORIGINAL documents the infamous quotes come from. If anyone here also has the contexts of some of them, the paragraphs preceeding and following these quotes, would you mind copying them down here? I want to know what to make of these various statements by Luther, and I can't do that without their original contexts and citations from the primary documents so I can check them up. If anyone has information on this, I'd greatly appreciate hearing from you. Thanks a lot!
I've posted this, because it's such a rare occurrence to see such a question or interest posted by a Roman Catholic, and I have to give this person the "two thumbs up" for such an endeavour. With the Internet now, a large portion of primary materials can be located, so hopefully the days of "The Facts About Luther" are over.
The post went on to suggest this blog as a place to find such materials. In regard to "sin boldy," information on this can be found here. Information on "Christ committed adultery" can be found here.