Are We All Proportionless?

I mean, what did St. Paul have in mind when he said, I can't do evil that could make come of it? Was he talking about some specific kinds of actions that we can't do? Or was he just kind of like, well, don't do evil. It seems to me that he lists off a whole bunch of things in Corinthians and elsewhere that can never be done. So we must have something objective in mind. And there's no nothing we can look at. Say this is always evil. We just have to look at all the circumstances.