《荀子·子道》
所以，可以服从而不服从，这是不尽孝子之道；不可以服从而服从，这是不忠于父母。明白了这服从或不服从的道理，并且能做到恭敬尊重、忠诚守信、正直老实地来谨慎实行它，就可以称之为大孝了。
故可以从命而不从，是不子也；未可以从而从，是不衷也；明于从不从之义，而能致恭敬，忠信、端悫、以慎行之，则可谓大孝矣。
Therefore, it is possible to obey and not obey, which is not the way of filial piety; it is possible not to obey and obey, which is not the way of being loyal to parents. Once the principle of obeying or disobeying is understood and one is able to be respectful, loyal, honest, and cautious in his actions, one can be called truly filial.