Doing an exegesis on Paul is really a chore because, at first glance (and maybe second) he seems to be saying contradictory things (e.g., men being over women, but also saying that in Christ there is no male or female; some verses that suggest that Christ has replaced the Law and others that say that God's covenant with Israel would endure forever, etc.).
The good news is that for the past 15 years or so there's a new scholarly movement, led by James D.G. Dunn, that has a fresh interpretation of Paul. Our main problem, they say, is that we've been conditioned to reading Paul through the eyes of Martin Luther (who took Paul's ideas and applied them to the 16th century Roman Catholic Church). The New Perspective on Paul, as it's called, starts by claiming that Paul actually only wrote Philippians, Romans, First and Second Corinthians, First Thessalonians, Galatians and Philemon. The other letters attributed to Paul were actually written much, much later.
Here's the theological bottom line of the New Perspective folks: Paul was speaking to two audiences; to observant Jews he basically said, "Keep on keepin' on -- God never reneges on a covenant." To the increasingly large number of Gentile followers he said, "You've finally been included in God's covenant -- just don't try to become Jewish to 'earn' your way in. You're in by God's grace. So, basically, we have two co-equal covenants. Anyway, that's the New Perspective's take on Paul.