(There are) some things that, no matter how much you practice, they’re never going to be as comfortable as what you would like …. I think almost everybody has that little solo that brings them upright in their bed in the middle of the night. Yeah, there’s some things you just have to keep practicing because you know that if you don’t, it’s going to backslide … the mechanical parts about it are like housekeeping – you know when dust is falling here, you are dusting over there, and the dust is falling wherever you haven’t dusted, and you’ve got to go back again and again and again, and its never over. And it’s that way until the last day you play your instrument – you’re just going to have to grind out certain aspects of performance on the instrument. So you may not look forward to it, but you know you have to do it.
-Grover Schiltz
I found this via this link. Robyn Dixon Costa’s thesis. Very interesting reading!