From 《
左传·
襄公二十四年》 (Zuo Zhuan, Duke Xiang Year 24, c. 549 BCE):
太上有立德,
其次有立功,
其次有立言,
虽久不废,
此之谓不朽 - 'The highest is to establish virtue, next achievement, next words; though long passed, they are not abolished - this is what we call imperishable.' The phrase became Confucianism's highest measure of a life well lived.