I love JA Konrath's blog, and this message is just one of the reasons why.
I'll admit that my confidence is shaky, even at the best of times*. But I admire his outlook and will strive to find that self-confidence in my own writing. :)
*Okay, sometimes I have back-slapping, YOU ARE A GENIUS! moments. They're few and far between, but when they happen, there ain't nothing that can stop me. I need to bottle that stuff.