Yes, we all know this.As we all know faith in Christ's forgiveness is what justifies. Doing righteous things in the law hoping that God will declare you righteous for doing those righteous things can not justify you. That's why justification is by faith, apart from works of the law.
5 But to the one who does not work (to be justified--see context), but believes in Him who justifies the ungodly, his faith is credited as righteousness, 6 just as David also speaks of the blessing on the man to whom God credits righteousness apart from works (of the law to be justified--see context)..." (Romans 4:5-6 NASB parenthesis mine)
The problem with this view is that justification is a legal declaration, not a mode of action or causation.This declaration of righteousness which is not achieved by doing works of the law, but apart from them, is then seen in righteous works of the law ('do not steal', etc.). If justification does not change a person into a new creation who then acts according to that new nature, they either did not receive the new nature he thinks he did, or is carelessly treating the free gift with contempt.
Rom 5:16 - The gift is not like that which came through the one who sinned; for on the one hand the judgment arose from one transgression resulting in condemnation, but on the other hand the free gift arose from many transgressions resulting in justification. NASB
The word for "justification" is:
dikaiōsis
1) the act of God declaring men free from guilt and acceptable to him
2) abjuring to be righteous, justification
Justification by God does not cause anything. If it did, we would all just be puppets.
God gave us His Holy Spirit for the power to do righteous things. But we must be filled (Eph 5:18) and walk by means of the Holy Spirit (Gal 5:16), and NOT grieve (Eph 4:30) or quench (1 Thess 5:19) the Spirit.We were given the new nature through our faith in Christ's forgiveness, so we can then do righteous things--those righteous things confirming the faith that produced them in us.
This is true, but doesn't prove anything, such as that one doesn't believe. Believers continue to sin. That certainly doesn't confirm one's faith in Christ. Believers can be hypocrites, which doesn't confirm one's faith in Christ.If you can't confirm that you have faith in Christ through what you do, it's time to examine your faith, and/or your attitude toward the grace of God.
Please note, I'm not in the least defending sinful believers. But let's be honest about what Scripture talks about.
I like what Paul told the Ephesian believers:
Eph 4:17 - So this I say, and affirm together with the Lord, that you walk no longer just as the Gentiles also walk, in the futility of their mind,
The phrase "no longer" clearly indicates something that they were still doing. We find the exact same phrase in Acts 4:17 - “But so that it will not spread any further among the people, let us warn them to speak no longer to any man in this name.”
Clearly the disciples WERE speaking to others in Jesus' name. And the Jewish leaders warned to stop doing it.
That is what Paul was saying in Eph 4:17; stop living (sinning) like the Gentiles.