C2565 Zhenqi
What is the Heavenly Dao?
If he wanted to figure out what the Heavenly Dao was, he had to first figure out what it was. The Dao was the ultimate truth, the origin, the body, the laws, the principles, the realms, and so on. Name is a concept, but Dao is not a concept. Dao is real.
As for the Heavenly Dao, it referred to the Dao that operated for eternity. The Tao gives birth to all things