A return to loving fathers and devoted sons "The principle of filial piety includes both material and spiritual levels," says Yeh Kuang-hui. According to his research, in traditional Chinese society the material or concrete manifestations of filial piety have always changed with the times and the environment. There has never been a set formula.
回歸父慈子孝「孝道包含的是實質與精神層面，」葉光輝仔細梳理孝道內涵時表示，實質層面上，也就是具體的孝道行為，在傳統中國社會的發展，一直是隨著時代與環境有所因應，沒有固定模式。