How do you know when your music harmony classes are finally starting to "stick"?
When you're working on a band piece called A Tribute to Elvis and you've taken a pencil and marked up the 12/8 triplet arpeggios in "Can't Help Falling in Love" with things like "G," "Bm (iii)" and "Em (vi)."
How do you know when your parallel love-hate relationships with arpeggios and metronomes are paying off?
When you can play those suckers. Mwahahaha!