Don't get me wrong, I like being published. It's a very rewarding experience, and I intend to continue pursuing it.
But if I never sold another thing, I would continue to write. And when I'm feeling down about a lack of contracts or a no from a publisher, I remind myself of that. I'm getting to do what I love. Occasionally I get paid for it. And that's pretty great.
If you knew you would never get published, would you still be writing stories?
(P.S. If you're in the New York area, there will be a cool event going on in your neck of the woods next week called Lamplighter Guild. It's both a spiritual retreat and a time of instruction in the art [including writing] you've been gifted with. You can visit the Lamplighter Guild website for details.)