Kathleen Norris said this quote

“ What we perceive as dejection over the futility of life is sometimes greed, which the monastic tradition perceives as rooted in a fear of being vulnerable in a future old age, so that one hoards possessions in the present. But most often our depression is unexpressed anger, and it manifests itself as the sloth of disobedience, a refusal to keep up the daily practices that would keep us in good relationship to God and to each other. For when people allow anger to build up inside, they begin to perform daily tasks resentfully, focusing on the others as the source of their troubles. Instead of looking inward to find the true reason for their sadness - with me , it is usually a fear of losing an illusory control - they direct it outward, barreling through the world, impatient and even brutal with those they encounter, especially those who are closest to them. ”