The thing about Paul is that there are a lot of supposed Paulisms that are actually him quoting some other viewpoint and responding to it; ancient Greek didn't

The thing about Paul is that there are a lot of supposed Paulisms that are actually him quoting some other viewpoint and responding to it; ancient Greek didn't really have good syntax for quoting, so nearly all translations lost that. 1 Corinthians is full of these, including the context surrounding the oft-quoted 1 Corinthians 6:9-10; the whole chapter (really, the whole letter) consists of him calling out the Corinthian church for judging others for ostensible sins despite themselves being sinners by their own standards - a classic invocation of Matthew 7:5.