Hello Grace777,
With all due respect, it doesn't matter whether James is speaking to Jew or Gentile, for The other words in the context support the meaning. The verse says "If any of you wander away from the truth" which would mean that believers in Christ are in view. The scripture reveals that while in that wandered state they are accumulating sin and are on their way to death. But, if another believer brings them back, then they will save that person from death and hide a multitude of sins. Please consider what Paul said to the Galatian believers:
"[/B][/B][/B][/B][/B]Do not be deceived: God cannot be mocked. A man reaps what he sows. Whoever sows to please their flesh, from the flesh will reap destruction; whoever sows to please the Spirit, from the Spirit will reap eternal life."
In other words, a person can say that they are in Christ all they want, but anyone who is willfully sowing to the flesh, they will reap destruction. I would also remind you that Paul is not writing to unbelievers, but to the Galatian church. Salvation by grace through faith is like a wall socket and a plug. The wall socket is the believers connection to God's grace and the plug is the individual faith. As long as we are having faith, we are plugged into God's grace. But, when we stop having faith, then we have unplugged from the wall socket of grace. We need to plug back in to make connection to God's grace.
In Luke's version of Mt.24, Jesus said the following to His disciples and therefore to all believers:
"Be careful, or your hearts will be weighed down with carousing, drunkenness and the anxieties of life, and that day will close on you suddenly like a trap.For it will come on all those who live on the face of the whole earth.Be always on the watch, and pray that you may be able to escape all that is about to happen, and that you may be able to stand before the Son of Man."
"Closing on you suddenly like a trap" doesn't sound very reassuring for the believer, does it? Our salvation comes through God's grace and our part is faith. Salvation is based on our continuing in faith, from first to last. For without faith it is impossible to please him. As I said, there is just an overwhelming amount of scripture demonstrating that our salvation is dependent upon our having faith. I am not one who believes in once saved, always saved. However, I do believe in "once saved, always saved" if we continue in faith. I believe that James 5:19 means exactly what it conveys.