You stop growing when you stop listening.
My own musical background is based in the blues, and in classical composition. I grew up listening to Muddy Waters, John Coltrane, Miles Davis, Beethoven and Bach.
You're not listening to the Zen master, what he is saying outwardly, but even more importantly...what he is saying inwardly.
Put on the music, and listen. Zazen means to sit, to listen. You're listening to enlightenment, to the universes, to the planes of mind.