Okay Paul is explaining salvation by faith, James is explaining that if you have faith in the cross it will be shown by works, not your works, but the Holy Spirit working through you so it's hand in hand and no contradiction. go get a double cheeseburger and think about it.
Our faith is in what Christ did on the cross...not in the cross...that is a different gospel...are you one of those who have a cross with beads....or hanging around your neck?
what you are explaining is faith without works...dead faith...