A nagging sense of discontent, a feeling of being dissatisfied, or of something being not right, is the fuel that gives rise to anger and hatred. This discontent arises in us when we feel that either we ourselves, or someone we love, or our close friends are being treated unfairly or threatened and that people are being unjust.
— His Holiness The Dalai Lama, The Path to Tranquility by His Holiness The Dalai Lama, Renuka Singh, editor