When my sense of self depends on what others say of me, anger is a quite natural reaction to a critical word. And when my sense of self depends on what I can acquire, greed flares up when my desires are frustrated. Thus greed and anger are the brother and sister of a false self fabricated by the social compulsions of an unredeemed world.

—Henri Nouwen, The Way of the Heart: The Spirituality of the Desert Fathers and Mothers