Tao Te Ching

“Completion of the self is true goodness…the Way that unites external and internal.”

— Zisi 子思 481 – 402 BCE via Daniel K. Gardner
(Kong Ji or Tzu-Ssu)
Confucius' grandson and early influence on Neo-Confucianism
from Doctrine of the Mean, Maintaining Perfect Balance, Zhongyong 中庸