Cattāri Brahmavihārā

Two lucid things … protect the world: moral shame and moral fear. If these two things were not to protect the world, then one would respect neither one’s mother, nor one’s mother’s sister, nor one’s brother’s wife, nor one’s teacher’s wife … Buddhaghosa (Atthasālinī II, 7)

Give up hopes of changing the world until we’ve changed ourselves.