Don't judge a book by its letters

[donq]

Don't judge a book by its letters.

No, I haven't miswritten.

We all know about "not judge a book by its cover" For example, a man likes a woman just because of how she looks. And vice versa. Don't get me wrong, I'm also like that, even I've tried not to.

Anyway, judge a book by its letters is not easy, either. I mean, everyone can write what they don't really mean. Not to mention plagiarism. What they wrote is not who they really are. For example, as I've been a long time editor, I personally know some professional writers who are not good persons at all in the real life. Still, what they wrote are really good (moral etc.) How so?