Proverbs 27:17 NRSV
Iron sharpens iron, and one person sharpens the wits of another.

Here is a post I previously wrote on Proverbs 27:17. I will say that when I said, “This doesn’t sit well with me” is a very invalid way to judge an interpretation of Scripture. But I think my conscience was telling me something so I looked into it and posted on what I found with the tools I have.

Here is a much better post dealing with it from the original language and various interpretations from other scholars at Ancient Hebrew Poetry. If some parts are too heady, skim them and you can still get a good idea of various interpretations.