Good works are product of salvation, not the means of salvation. Paul and James are not in opposition; they are back-to-back defending against legalism and antinomianism.
I agree, but it takes a born again, regenerated spirit, to understand that kind of spiritual truth. Unregenerate man will NEVER grasp spiritual truth, for it is spiritually discerned.
Can one lose their salvation? I don't believe it. Now, I can see the wheels turning in the heads of works based religionists. They may try to say that, well then, I can get saved, and then live like hell. Not under ANY circumstances is that true.