Where the Argument Collapses
Paul does not use the word Leviticus uses. He uses the other one, three times in this single verse.
And the chapter says plainly what the argument was. Verse 2 gives the two sides. One man eats all things. The other eats vegetables. Nobody in the room is arguing for swine.
The Claim
Paul says nothing is unclean of itself. If nothing is unclean, then the food laws are a matter of personal conviction, and a man who keeps them is the weaker brother.
The Verse
I know, and am persuaded by the Master Yahushua, that there is nothing unclean of itself: but to him that esteemeth any thing to be unclean, to him it is unclean.
— Romans 14:14
The Word He Used
Greek has two words here. English gives you one.
Koinos means common. It describes a clean thing that has been made dirty by contact or by handling. Something made it that way, and something can undo it.
Akathartos means unclean. It describes what a thing is. Nothing made it that way and nothing undoes it. This is the word the Greek Old Testament uses in every place Leviticus 11 says unclean.
Paul uses koinos three times in verse 14. He never uses akathartos anywhere in the chapter.
Foundation F-10 carries the two words in full.
Read It With the Right Word
Put the meaning back in and the sentence reads this way: nothing is common of itself.
That is not a sweeping statement. It is the definition of the word.
Nothing is common by nature, because common is a thing that happens to something clean. A loaf is not born common. It becomes common when the wrong hands touch it.
Paul is not overturning a category. He is stating what the category means.
What They Were Actually Arguing About
The chapter tells us. It does not leave it open.
For one believeth that he may eat all things: another, who is weak, eateth herbs.
— Romans 14:2
Those are the two sides. Eat everything, or eat vegetables only.
That is the whole spread. Nobody in the chapter is asking about swine. If somebody had been, the answer would not have been vegetables.
Verse 21 names it again — flesh and wine. Meat and drink from the market. Not a list of creatures.
Why the Meat Was Doubtful
Clean meat sold in a Roman market had passed through Gentile hands. It may have been offered to an idol before it reached the stall. Nobody could tell by looking.
One group in Rome held that such meat had been made common by the handling. So they ate no meat at all. Vegetables were the only safe choice.
That is a real problem, and it is a problem about contact, not about creatures.
It is also not a Torah rule. Torah never said a clean animal becomes forbidden because a foreigner handled it. That belief came from men.
The Second Half of the Verse
The rest of verse 14 is usually skipped, and it decides the case.
To him that esteemeth any thing to be unclean, to him it is unclean.
A man’s opinion makes it so. That is the whole force of the sentence.
Now test it against Leviticus 11. Does a man’s opinion make the swine clean? Does thinking well of it change anything?
It does not, and nobody claims it does. Which means the thing Paul is describing is not the Leviticus category. It is a category that moves with what a man believes — and that is exactly what common is.
Who the Weak Brother Was
The weak brother in this chapter is the one who eats vegetables. Verse 2 says so.
He is weak because he has added a restriction Torah never gave. He is refusing lawful meat out of fear that it was mishandled.
The strong brother is not the one who eats whatever he likes. He is the one who understands that a clean animal is not ruined by the hands it passed through.
Paul then tells the strong to carry the weak instead of despising him. That is the point of the chapter.
The Verdict
Romans 14 is about meat from a Roman market and whether handling made it common. It is not about what Yahuah defined as food.
Paul used the word for common. He never used the word for unclean. And he ended the verse by saying the condition depends on what a man believes — which is true of common and has never been true of unclean.
Foundations Cited
F-10 Common Is Not Unclean · F-09 Commandments of Yahuah, Traditions of Men