If I run across a particularly difficult to understand passage, I'll read a commentary or two, sometimes look for a sermon or article online. Sometimes they are helpful, sometimes they aren't. Sometimes I don't agree with everything the author says but they make some valid points, or they bring up related scriptures that help to clarify. I think about commentaries like asking a pastor about a passage, or asking a Christian friend what they think. Some I would agree with, some I don't.