Here we go again!
Remember the exercises in critical reading you did in school, where you had to look at a piece of writing and step back and ask whether the author was telling the whole truth? If you really want to be a critical reader, it turns out you have to step back one step further, and ask not just whether the author is telling the truth, but why he’s writing about this subject at all.
This quote is relevant due to my interest in Christian origins. Why did the writer of the gospel of Mark write his gospel? I’m not sure this question has any consistent answer in NT scholarship.