Paul's Beliefs

[Undeceived]

Which parts of Paul's "gospel" were taken from the OT? Be specific.

Like Jesus being from the lineage of King David comes from Isaiah 9:7. Paul quite often brings up the prophets like in Romans 1:2.

What about borrowed theories or ideas? Ideologies? There's nothing in Romans 1:2 that suggests causality--Paul is simply pointing out that Jesus Christ was a descendant of David, as the Messiah was predicted to be (this is a standard persuasive technique). As far as theories or way of thinking, I see Paul's writings as a complement to the Old Testament, not more of the same. It has been the longstanding claim of atheists on this forum that the two testaments aren't linked at all, and that Paul created an entirely new religion. So which is it? If you say Paul references the OT to prove his new-age NT ideals, I and every Christian agrees with you. A better study would be checking how much of the Epistles have their root in the teachings of Jesus--I think you'd be more successful there.