I find many church doctrines are founded solely upon Paul's epistles, leaving the teachings of Jesus Christ as a mere footnote. One would think, they believe Paul is their savior, and Jesus the apostle of Paul. But worse yet, those who trust in these teachings are like blind men walking in the desert.
Paul is a great teacher...and one of my favorites, but teaching Paul without founding his teachings on what Christ taught his disciples, is like trying to teach Algebra to someone who doesn't know how to Add and Subtract. This is why the mainstream churches teach, the Christian is not under Gods Law, simply because Paul taught, "We are not under Law, we are under Grace." When it is this very Law which brings the believer their salvation.