John of the Cross,
The Spiritual Canticle
“ This voice, or this murmuring sound of the waters, is an overflowing so abundant as to fill the soul with good, and a power so mighty seizing upon it as to seem not only the sound of many waters, but a most loud roaring of thunder. But the voice is a spiritual voice, unattended by material sounds or the pain and torment of them, but rather with majesty, power, might, delight, and glory: it is, as it were, a voice, an infinite interior sound which endows the soul with power and might. ”
