The heaven-rank was a realm that determined one's Dao. One had to determine if one's Dao was innate or acquired.
There were 3,000 Dao, and these 3,000 Dao were innate Dao. Of course, the number of real Dao was far more than that. As for the acquired Dao, even if they were formed by two or more innate Dao, their power would depend on the individual's fusion.
There was only one path. When he reached the heave-rank, all the Dao laws and powers would be unified.
As the stairway leading from the earth-rank led to the heaven-rank, the National Guardian level naturally possessed the characteristics of the heaven-rank, where power and Dao were one.