It is very important and fitting for Your Reverence, if you desire to possess profound peace in your soul and attain perfection, that you surrender your whole will to God so that it may thus be united with him and that you do not let it be occupied with the vile and base things of earth.
Saint John of the Cross
Letter 13 to a Discalced Carmelite friar
14 April 1589
John of the Cross, St. 1991, The Collected Works of St. John of the Cross, Revised Edition, translated from the Spanish by Kavanaugh, K and Rodriguez, O with revisions and introductions by Kavanaugh, K, ICS Publications, Washington DC.