I believe I have mentioned this before but the muse often visits me in my Dark Chocolate Dove Promise.  They have a little message inside and sometimes the message really hits home.  Especially the one that says "why not have another."  The one today is worth sharing and hit's my writer's heart square in the center.

"Do not look back and ask why, look forward and ask, why not?" 

Most writers get stuck in the why's now and again, after a rejection for sure. But the thing about writing is, you have to practice perserverance.  If this editor didn't like your story idea, the next one might, so try again.  If this editor said the characters were flat or the story not believeable, then take an objective look at your work and see if there's some truth to what they have said.

One of the characters in my book (Feisty Family Values) is a mature woman in her late 50's and she shares her grandmother's wisdom with one of the teenagers in the book.  She says something like:  "don't look back, we're not going that way."  So, it's sort of the same thing.  Keep going forward toward the goal that you want to achieve.  Whatever that goal is, will only be achieveable if you keep trying.

Good luck on the journey, writing buddies. It is a rollercoaster ride, to be sure.
BD