哀莫大于心死 (哀莫大於心死) āi mòdà yú xīn sǐ

āi mòdà yú xīn sǐ phrase nothing sadder than a withered heart; no greater sorrow than a heart that never rejoices; the worst sorrow is not as bad as an uncaring heart
Domain: Modern Chinese 现代汉语
Notes: Explanation of an idiom attributed to Confucius by Zhuangzi (CC-CEDICT '哀莫大於心死')