Her Beloved is silent music

In that nocturnal tranquility and silence and in knowledge of the divine light, the soul becomes aware of Wisdom's wonderful harmony and sequence in the variety of her creatures and works. Each of them is endowed wíth a certain likeness of God and in its own way gives voice to what of God is in it. So creatures will be for the soul a harmonious symphony of sublime music surpassing all concerts and melodies of the world. Thus there ís in it the sweetness of music and the quietude of silence. AccordÍngly, she says that her Beloved is silent music because in the Beloved she knows and enjoys this symphony of spiritual music.

~ from SPIRITUAL CANTICLE by John of the Cross thanks to Gav Grissom
Spiritual Canticle
By St. John of the Cross