I definitely try to broaden the scope of music. I don't know if it's pop or classical or what, but I'm religiously challenging myself all the time, for better or for worse.
At times, Zen does get into some Buddhist Cosmology. Nishijima Roshi, my main teacher would talk about that and almost every time immediately say that it was only one way of looking at it. Whenever addressing realms of Heaven or Hell, he'd also address that it was just a psychological state.