BOTH Faith and good works are necessary. Faith - **working through love **.
I figure that I will address this first. The Lutheran Confessions state that works are necessary to the Christian life. So just keep that in mind as I address what you said about Paul’s declaration of what justifies us before God.
I disagree though that Paul emphatically said we are justified by grace apart from works. Paul doesn’t say that, and Jesus especially doesn’t say that.
Now we know that whatever the law says it speaks to those who are under the law, so that every mouth may be stopped, and the whole world may be held accountable to God.
For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin.
But now
the righteousness of God has been manifested apart from the law, although the Law and the Prophets bear witness to it
the righteousness of God through faith in Jesus Christ for all who believe. For there is no distinction: all have sinned and fall short of the glory of God,
and are justified by his grace as a gift, through the redemption that is in Christ Jesus, whom God put forward as a propitiation by his blood,
to be received by faith. This was to show God righteousness, because in his divine forbearance he had passed over former sins. It was to show his righteousness at the present time, so
that he might be just and the justifier of the one who has faith in Jesus.
Then what becomes of our boasting? It is excluded. By what kind of law? By a law of works? No, but by the law of faith.
For we hold that one is justified by faith apart from works of the law. Or is God the God of Jews only? Is he not the God of Gentiles also? Yes, of Gentiles also, since God is one who will justify the circumcised by faith and the uncircumcised through faith. Do we then overthrow the law by this faith? By no means! On the contrary, we uphold the law.
Now, by my count Paul (I do not make a distinction between what the Holy Spirit inspired through Paul and what Jesus says, I do not know what your view is on the Trinity, but we don’t do that) states explicitly twice that we are justified by faith apart from the law, once stating that we are not justified by the law, and several other times saying that we are justified through Christ by faith. If you are saying this level of repetition is not emphatic, then I don’t know what is. This doesn’t even go into the Greek grammar where there are several times where Paul places the sections about faith in the emphatic position of the sentence.
Again, to summarize my position, your works do not justify you before God (as Paul explicitly stated above), but they are necessary for the Christian life because God has never revoked our obligation to exercise dominion over his creation and to love our neighbor.