I have had one message for Jews and Greeks alike—the necessity of repenting from sin and turning to God, and of having faith in our Lord Jesus.
Acts of the Apostles 20:21 NLT

One Message…

With no partiality…

The NEED for:

1) repenting from sin and turning to God

2) having faith in our Lord Jesus

One Message

Paul lays out in the book of Galatians the gospel of “Christ alone” and that the Holy Spirit alive in us is the key. And he warns about any other gospel that is based on works, traditions, etc.

I am shocked that you are turning away so soon from God, who called you to himself through the loving mercy of Christ. You are following a different way that pretends to be the Good News but is not the Good News at all. You are being fooled by those who deliberately twist the truth concerning Christ. Let God’s curse fall on anyone, including us or even an angel from heaven, who preaches a different kind of Good News than the one we preached to you. I say again what we have said before: If anyone preaches any other Good News than the one you welcomed, let that person be cursed.
Galatians 1:6‭-‬9 NLT

So there is One Truth, not up for debate or twisting, or denial without consequences:

Jesus told him, “I am the way, the truth, and the life. No one can come to the Father except through me.
John 14:6 NLT

No Partiality

Paul lays out in Romans that God does not show favoritism or partiality – that our blood lines, our church participation, even our own works (which are filthy rags in the eyes of a holy and righteous God), are not going to win us undue favoritism or preferential treatment from God — and that He is just that the wicked are punished and those that seek him will be given eternal life.

Those who seek the wages of sin (death) will receive death, and those who seek the glory and honor of God will receive life.

Don’t you see how wonderfully kind, tolerant, and patient God is with you? Does this mean nothing to you? Can’t you see that his kindness is intended to turn you from your sin? But because you are stubborn and refuse to turn from your sin, you are storing up terrible punishment for yourself. For a day of anger is coming, when God’s righteous judgment will be revealed. He will judge everyone according to what they have done. He will give eternal life to those who keep on doing good, seeking after the glory and honor and immortality that God offers. But he will pour out his anger and wrath on those who live for themselves, who refuse to obey the truth and instead live lives of wickedness. There will be trouble and calamity for everyone who keeps on doing what is evil—for the Jew first and also for the Gentile. But there will be glory and honor and peace from God for all who do good—for the Jew first and also for the Gentile. For God does not show favoritism.
Romans 2:4‭-‬11 NLT