Negation has to do with an understanding that truth is independent of beliefs and that no beliefs are at all required to live in the light of truth.  So then, negation says "I am satisfied only with the total and complete truth, nothing else is valuable".  When only truth is valued, negation automatically occurs.  If you would like support in the negation of beliefs, you can book a call together on my website:  https://nickshibanov.com/1