Detachment
He, then, is very unwise who, when sweetness and spiritual delight fail him, thinks for that reason that God has abandoned him; and when he finds them again, rejoices and is glad, thinking that he has in that way come to possess God.
More unwise still is he who goes about seeking for sweetness in God, rejoices in it, and dwells upon it; for in so doing he is not seeking after God with the will grounded in the emptiness of faith and charity, but only in spiritual sweetness and delight, which is a created thing, following herein in his own will and fond pleasure. It is impossible for the will to attain to the sweetness and bliss of the divine union otherwise than in detachment. St. John of the Cross