Interpreting criticism

Heartfelt criticism of your idea or your art is usually right (except when it isn't...)

Check out this letter from the publisher of a magazine you've never heard of to the founder of a little magazine called Readers Digest:

But, personally, I don't see how you will be able to get enough subscribers to support it. It is expensive for its size. It isn't illustrated... I have my doubts about the undertaking as a publishing venture.

Of course, he was right--given his assumptions. And that's...