When I finally acquired an agent, and after she sold my first book, I created a 3-book romantic series. One of my characters was a literary agent. My agent told me no one wanted to read about a literary agent. She didn't try to market the series. I let her discourage me.
Awhile later an amateur detective series hit the stores. The sleuth--a literary agent. The series was written by the first agent who rejected my so called mediocre book. Evidently someone was interested in reading about literary agents.
And round and round we go. Where we stop, nobody knows.
I have always put professionals on a pedestal--the doctors, lawyers, policemen, teachers, editors, publishers and literary agents--and assumed all knew more than me. I was wrong. I know a lot. And there are times I actually know more than the professionals. I'm the authority when it comes to books I want to write and the passion I feel for them.
I believe all ideas are good. Some are better than others. Most need tweaking in some way. I believe ideas bounce around until someone grabs them and does something with them. Don't waste an idea because your agent or editor doesn't like it. Tweak it until they do like it.
Learn from my mistakes. Don't quit. Don't allow anyone to discourage you. Write your passion.
And never, never, never give up.
The writers who succeed are the ones who refuse to buckle under the failures that are heaped upon them; who reject the notion that they aren't as mediocre as industry professionals say they are. ~Jodi Piccoult