I just made it through the 13th Prelude and Fugue from Book II of Bach's Well-Tempered Clavier, and I feel like I have been through all kinds of secret doors to leading to secret corners of an uncharted harmonic world. Those six sharps are kind of like a chain of sharp rocks or some barbed-wire fencing, but once you face your fears and make your way in, there are all sorts of harmonic cushions that pull you forward in spite of the double-sharp-filled rough terrain.
And then there's the fugue.
I have to play it relatively slowly, and I have to be careful of every step, but the journey has rewards and resolutions that boggle my imagination.
This wasn't my first time through. My first encounter was this past August, and I found the twists and turns in the piece mirrored much of what I was going through at the time. I dragged myself through determined to get to the other side. This time the journey was different. I found it exhilarating.