《颜氏家训·序致篇》
古代圣贤们的书籍，主要教导人们要忠诚孝顺，言语要谨慎，行为要检点，建功立业使名播扬等道理，这些已经说得非常的详细全面了。
夫圣贤之书，教人诚孝，慎言检迹，立身扬名，亦已备矣。
The texts written by the ancient sages and saints mainly teach people to be loyal and filial, to speak with caution, to behave in a self-disciplined manner, to accomplish meritorious deeds, to spread fame, etc. These teachings are already extremely detailed and thorough.