For as St. Gregory avers, the goods of this life are irksome to all spiritual men, because they know they are a clog to their inward desires ; "our soul," he says, "can never be without some delight; for either it pleaseth itself in base and unworthy things, or in things high and worthy; and the more earnest it is in the prosecution of high delights, the more it loatheth the inferior; and the hotter it is upon the desire of the inferior, the more damnable is the cold tepidity, with which it goeth about the higher. These two loves cannot dwell in one heart: the corn of supernal charity cannot grow, where the thorns of base delight choke it."
pg. 112 of Origin and progress of religious orders, and Happiness of a religious state by Fr. Platus, S.J.