Hsiao (Filial Piety): Father and mother are Heaven and earth. Only filiality can move Heaven and earth, ghosts and deities. Ancient people placed Hsiao at the top of the list of a hundred good deeds. Nowadays people do not know Hsiao, because they do not realize the gifts their parents bestowed on them. Even if they realize this, they are often blinded by their spouses, or by material wealth. They should realize, as their parents grow older and weaker, that failing to offer filial piety and care for their parents in time may bring regrets later on, when it is too late. Lambs kneel for their milk, and the ravens feed their old parents. If humans do not repay the favors of their parents, they cannot even compare to animals.