The magnificent Amy Bloom in her intro to the edition of Ploughshares for which she was guest editor, says (on writers sending out stories):
If you are lucky, and the world is turning properly, there is a handwritten note at the bottom, inviting you to send more, to try again. People have been known to persist for another five years, just on those letters, and a literary magazine that can’t be bothered to encourage pretty good writers to become better should find another way of doing business.
Hurrah! I love her so much. What an absolutely cool, brave thing to say.