Topic on discussion of heavenly truth in ancient times in the plain questions (First article part IX) [1]

And the next, there were sagacious men. They followed the rules of the heaven and earth, acted in accordance with the running of the sun and moon, and the changes of the stars. The sagacious men submitted to yin and yang, and differentiated the four seasons. They practiced following the remotely ancient people, and adhered to rules of health preservation. Their life span was also prolonged to the boundaries of its natural limitation.