What's the difference? Part 2

In our family photo library, there seem to be a huge number of photos of me sitting on the piano bench.  That's not really a surprise, I guess, when you consider my occupation.  Sometimes I'm sitting with my back to the keyboard, sometimes facing it. I'm still thinking about the stubborn/persistent thing and came up with this comparison; please accept it as my attempt to lighten up a weighty thought!

The notes on the page are stubborn - inflexible and unchanging.  

I am persistent in my practise until I can perform those notes to the best of my ability.