When James & Paul wrote about "works of the law", they each meant "the law" according to their own interpretation of it. Or according to the traditional interpretations through which they'd come up. So says Martin Abegg, according to David Stark.
I gasped audibly when I made the following connection. This sounds exactly like when christians say "We follow only the Bible!" What they always mean, of course, is the Bible according to them.
Suddenly I'm re-reading Paul's critiques on "works of the law" as if he were attacking "only the Bible". That's fascinating, and fun, but I don't know how well it fits in the first century. So if anyone who's read Abegg would respond to my sudden apostrophe, I'd be glad for the feedback. Or just try it on with me and see what you think...