āimòdàyúxīnsǐ

Traditional: 哀莫大於心死

nothing sadder than a withered heart (idiom attributed to Confucius by Zhuangzi [[莊子|庄子<Zhuāngzǐ>]]) / no greater sorrow than a heart that never rejoices / the worst sorrow is not as bad as an uncaring heart / nothing is more wretched than apathy