All final spiritual reference is to be the silence beyond sound. The word made flesh is the first sound. Beyond that sound is the transcendent unknown, the unknowable. It can be spoken of as the great silence, or as the void, or as the transcendent absolute.
Music has a divine message and messenger of life. It was quintessentially the "Quickening art" -- quickening my soul with this my body, so that suddenly, spontaneously, I was quickened into motion, my own perceptual and kinetic melody, quickened into life by the inner life of music. I was carried ahead by the ongoing musical stream.