Grace does not depart from a person completely, but only partially, for a period of time. Sometimes if a person becomes proud, grace withdraws, so the person falls, recognizing his own weakness, and therefore he does not go back to being prideful. In this case, this withdrawal is a kind of medicine. Other times, grace withdraws a little as a form of divine providence so the person yearns for grace, prays for grace, thus in the process they grow in prayer, giving thanks to God for responding to their petitions, while not slacking, struggling, and so on.

—H.H. Pope Shenouda III, Struggle and Grace