Rejection can be a great motivator. My favorite kind of rejection is the kind that comes in a form letter with a little something tacked on at the end.
Most recently I received this one.
Thanks for submitting your poems —we greatly appreciated the chance to read them. However, after careful consideration, we don't feel they are a fit for us.
[Here is where I almost hit the delete button until I glance at the following line]
We really did like your style, though, and we hope you'll submit to us again in the future.
[This is when I get motivated and start looking through all of my work to find the next poems to submit]
Maybe the next time I hear from this publication it maybe an acceptance. And even if it's not I know I can turn rejection into motivation.