John of the Cross,
Ascent of Mount Carmel
“ Our vain concupiscence is of such a nature and quality that it tries to establish itself in everything; and it is like the worm which destroys healthy wood, and works upon things both good and evil. For what else is your desire to have a rosary of cunning workmanship, and your wish that it shall be of one kind rather than of another, but the fixing of your rejoicing upon the instrument? It is like desiring to choose one image rather than another, and considering, not if it will better awaken Divine love within you, but only if it is more precious and more cunningly made. ”

