In Confucian ideals, filial piety is one of the virtues to be held above all else: a respect for the parents and ancestors. The Confucian classic Xiao Jing or Classic of Xiào, thought to be written around 470 B.C.E., has historically been the authoritative source on the Confucian tenet of xiào or "filial piety". The book, a conversation between Confucius and his student Zeng Shen, is about how to set up a good society using the principle of "filial piety", and thus for over two thousand years has been one of the basic texts to be examined on in the Chinese Imperial Civil Service Exams. The term can also be applied to general obedience, and is used in religious titles in Christian Churches, like "filial priest" or "filial vicar" for a cleric whose church is subordinate to a larger parish.