That title is latin, by the by. Who Dares, Wins.
The hard part is being daring.
Rejection is a hard thing. In wearing my editor's cap (a stylish coonskin number, ala Red Dwarf's Dave Lister) I often have to dole out rejection. Part of it is that we are a small publisher and we have to be very selective about what we do publish. Part of it that we aren't always equipped to sell in some markets. And sometimes…things just aren't good enough yet.
But that shouldn't really be the end.
EVERYTHING benefits from polish. If you think something is good enough, even if you get twenty rejections, polish it, rewrite, and keep at it. I'm sure I could regale you with anecdotes about Very Famous Authors who got dozens of rejections before they found the one acceptance and now they're Fiction Gods.
But really those anecdotes shouldn't really matter. If you're passionate about writing, you write. And if you are passionate about having your book out there, you'll write and re-write and write some more until you get it published. You just have to get thick skin sometimes. And you've got to get daring.
Who Dares Wins.