Ying and Yang to me is to whiten the lower self as much as possibly possible, then meshing with higher self.

It is impossible to mesh /absorb your higher self if you ever do evil. That is why you never eat from God's table and the table of demons at the same time.


Flee from Idolatry
No, but the sacrifices of pagans are offered to demons, not to God.

And I do not want you to be participants with demons. You cannot drink the cup of the Lord and the cup of demons too; you cannot partake in the table of the Lord and the table of demons too. 1 Corinthians 10:21