I think Toni McGee Causey's blog post How Do You Know When To Quit is taking the Internet writing world by storm, much as Susan Boyle's I Dreamed A Dream audition video did.
If you've ever felt dejected by writing rejection, please do yourself a favor and read Toni's blog post. It's about one of my friends, Christie Craig, now a hot commodity, but once a struggling writer collecting rejections instead of royalty checks.
If you think your couple or a couple of dozen rejections are too crushing to overcome, then you definitely need to know Christie who collected about 3,000 rejections. Like the old Timex TV commercials, she took a licking each time, but she kept on ticking. She believed in herself, and she wanted her dream desperately. She dreamed a dream, and she let nothing stop her from turning it into reality.
Dreams are nothing but dreams until you build a foundation under them. For a writer, building a foundation means you write. And write. And write.