Whining with Intention

Day 24

Today as I was warming up with a descending C Major scale as per usual, I thought to myself in a distinctly whiny tone, "I just can never play that C smoothly from the low D!"
And then I thought, yes I can. I know exactly how to do that. I've been told by some of the best teachers in the world precisely how to do that. And so I did it, played a smooth rich low C slurred from a D. Whoa. That was too easy.
So the rest of my practice today, I didn't just hear the things I didn't do perfectly, I whined about them, verbally and irritatingly. "I can't blow through that high B and make it to the next note on time." Yes, I can. I just did. "I can't valve trill that softly for three beats." boom. Yes I can. 
This feels like a discovery, though I'm sure I've discovered it before. Truly there is nothing I straight up cannot do on the horn. I have been taught to do everything, and do it well. But somehow that whining statement that gets my optimistic-voice going (of course I can, I can do anything!) is exactly what I needed to actually practice at my potential, for a couple hours at least.