So, I'm wrestling with this question Zach posed the other day: Did Jesus abolish the Law or didn't he (ie. Did Paul contradict Jesus)?"
There are many ways to wrestle with this question and not all of those ways will come to the same conclusions. The theory that Paul created Christianity is wildly popular. Check the Christianity section in Barnes & Noble and you'll find loads of books claiming that Christianity should really be called 'Paulianity' (or 'Constantinianity', or 'Robbellianity').
But I don't buy those theories. And I certainly don't approach these questions from a point of objectivity or neutrality. I'm postmodern enough to say that I don't believe that questions like these can ever be approached with neutrality. An awareness of one's presuppositions can be very helpful when wrestling with questions like these. So...here're some of mine.
1) Neutrality is overrated
2) The New Testament was written in Greek, not English
3) Words matter
4) Jesus meant something
5) So did Paul
6) Their intentions matter
7) The Bible is perspicuous
8) There is a right way around the analogical circle of predication
9) Bombasticity can make you sound pretentious
10) The Bible was written over time
11) The Bible was compiled over time
12) The folks who pulled the Bible together did so intentionally
13) They didn't see any major contradictions
14) 'Major' is a major word
15) Jesus doesn't say "major" even once
16) Jesus did have a lot to say
17) Some of those words are recorded in the Bible
18) Jesus spoke to a particular primary audience
19) Paul wrote to a particular primary audience
20) Their audiences weren't the same audiences
21) Those primary audiences weren't us
22) Their words still matter to us
23) The Bible is our rule for faith and practice
24) The Bible contains no contradictions
25) At least, not on anything important
26) When Jesus and Paul appear to contradict, keep digging
27) By digging, I mean googling, word studies, and asking questions
28) I can't do this digging by myself (not smart enough)
I have a lot more cards, but I thought it might be helpful for you to see these before we move on.