Thomas Merton, The Seven Storey Mountain
, Part 3, Chapter 4 (The Sweet Savor of Liberty):
It is an austere warmth, the warmth of Gregorian chant. It is deep beyond ordinary emotion, and that is one reason why you never get tired of it. It never wears you out by making a lot of cheap demands on your sensibilities. Instead of drawing you out into the open field of feelings where your enemies, the devil and your own imagination and the inherent vulgarity of your own corrupted nature can get at you with their blades and cut you to pieces, it draws you within, where you are lulled in peace and recollection and where you find God.