" Since the will has never tasted God as he is or known him through some gratification of the appetite, and consequently does not know what God is like, it cannot know what the pleasure of God is; nor can its being, appetite, and satisfaction know how to desire God, for he transcends all its capacity. Thus it is obvious that none of all those particular things in which it can rejoice is God. In order to be united with him, the will must consequently be emptied of and detached from all disordered appetite and satisfaction with respect to every particular thing in which it can rejoice, whether earthly or heavenly, temporal or spiritual, so that purged and cleansed of all inordinate satisfactions, joys, and appetites it might be wholly occupied in loving God with its affections. For if in any way the will can comprehend God and be united with him, it is through love and not through any gratification of the appetite. "

― John of the Cross , The Collected Works of St. John of the Cross