The OP wasn't about justification only, but about salvation. Salvation is more than just our justification. It includes our regeneration, justification, sanctification, and glorification. Christ didn't die for our justification alone, His atonement includes our sanctification. What a glory to know that the truly regenerated one will move on to good works.Do any good works make us more approved/justified before God then? No, as we are when first saved fully justified!
Again, good works are a fruit of the Spirit. We are not talking about good works that originate in man, for we all agree that such works are filthy rags.