Whether Paul did or did not write Hebrews aside, what are we to do with Biblical passages like this? Because Jesus also sounds like He's saying this too. How does that square with Paul teaching that we are saved by Faith Alone?
Especially since Paul frequently warns us to not sin too.
That's because sin is bad, regardless of dispensation.
I mean they all warn us to avoid sin, that's for sure, it's just that Jesus and Hebrews and James and Peter and John all sound like you can sin your way out of salvation, and meanwhile Paul (who's also just as hard telling us to not sin) also tells us basically we can't sin our way out of salvation.
Because salvation for the Jews (and Israel) is the establishment of Christ's earthly kingdom. You can be kicked out of that one, because there are physical consequences.
We in the Body of Christ, on the other hand, are saved from death caused by sin, and our security lies within the very character of God, not what we do or do not do.
In Jesus's words, or in the non-Pauline books, is there any hint or indication that it is faith alone that saves? It can just be a hint of it really, and then the whole New Testament does cohere with Paul.
You're basically asking for eisegesis.
Don't do that.
Look at what the context says.
Israel is about to finally get her kingdom, her Messiah has come, people are converting to the New Covenant that God promised He would make with Israel... and then a year after Pentecost, which was supposed to be when the final week of Daniel's prophecy takes place, yet Israel is in a miserable state, people who are supposed to be expecting Christ to return are constantly complaining about earthly things, keeping money for themselves they were supposed to give to the elders for sustaining the church, a man who claims to speak for God is killed, and then all of a sudden, a new apostle is chosen, who's only command is to take the gospel he was given to the Gentiles, a gospel that tells people that they don't needd to circumcise, which is literally the identity of the Jews, and not only do you not have to circumcise, but you don't have to keep any sort of law, yet you can have a relationship with God.
So what happens? People start to complain about that, too. "We're the people of the circumcision, God HAS to focus on us!"
This is literally what Paul is talking about in Romans 9-11!
There's no room for there to be "a single gospel" because the story of the Bible doesn't allow it!
And that's really I think the main problem Mid Acts is trying to solve, is the apparent incoherence between Paul and the rest of the New Testament, including Jesus Himself.
Not only does it try to solve it, it solves it by just letting scripture say what it says!
They can show from the Scripture the apparent incoherence. So there's high initial plausibility for Mid Acts. Which means to defeat Mid Acts, you have to come up with a defeater or two or more defeaters, and then those defeaters must stand up, and then you can defeat that high initial plausibility that the Mid Acts position does possess. It does seem like Paul sounds like he's singing a different key, at first blush, prima facie, at first glance, etc.
It sounds like it because that's what the story is telling us!
But if there are defeaters that stand up, then Paul's not singing a different key at all, and your position merely appears to be right, but it isn't actually right, because it's all built on the idea that Paul's singing a different key, but he isn't.
The problem is that scripture isn't going to have defeaters against itself.
Mid Acts says Paul's singing a different key, and that has high initial plausibility, it can be shown from the Scripture, so it stands, unless there are defeaters for it (and that stand instead). And that consists of any hint that we are saved by faith alone, found in the non-Pauline New Testament. (If Paul wrote Hebrews then ofc that would be a defeater for Mid Acts, because then you would have Paul saying Faith Alone, AND sounding like you can sin your way out of salvation.) But it doesn't have to be very clear, it need only be a hint. Such as John 3:16 for example. whosoever believeth in him should not perish, but have everlasting life.
Just because there are similarities between dispensations doesn't make them the same gospel, Idolater.
Things that are different are not the same, especially if the context of the story doesn't allow them to be.
I'm saying this because the position with the highest initial plausibility is that the New Testament coheres.
Yes, the Bible coheres. Scripture does not contradict itself.
That doesn't mean that it teaches the same message throughout.
This is apparently true, since it begins with Jesus, and He is definitely a new major character in the story of the God is Israel. So it's different from the Old Testament. But the New Testament coheres, is the position with the highest initial plausibility.
Mid Acts in showing incoherence is a defeater to this view.
Mid-Acts shows coherence within the story the Bible presents, not coherence in every doctrine it teaches.
If it taught the latter, then atheists would have every right to reject it, because things that contradict cannot be true in the same way at the same time.
If the apparent incoherence isn't actual incoherence, this can be shown by a defeater. If this defeater stands, then Mid Acts is defeated, and Mid Acts itself is a defeater of the view that the N.T. coheres. [So, that position would hold up.]
The Bible says what it says. It says different (sometimes seemingly contradictory) things at different points. The context of what it says, combined with the fact that the Bible is written as a singular coherent story, allows for this.