Reality (that is, individual things themselves) is one-sided and untrue if it is abstractly regarded as only individual; It combines with the concept to gain the universality of the concept, thus denying its original one-sided and abstract individuality, which is the "negation of negation". After this negation, the universality of concept and the individuality of reality are unified, and in the process of unification, they reconfirm themselves (for example, some universality of human beings is embodied in Faust and Hamlet).

In the dialectical process, the negation of negation shows two procedures: the first is negation, and the concept sets the opposite (reality) in itself to deny its abstraction and one-sidedness; Secondly, the negation of negation, that is, the unity of concept and reality negates this opposition. The difference between the two programs is only for convenience of explanation. Actually, no two programs can be separated in time. When the concept establishes the opposite, it has denied itself, and at the same time denied the negation from unity and reconfirmed itself. The so-called two schemes are just two sides of the same movement. The intermediary role of concept borrowing is in self-denial, that is, in self-determination (acquisition of qualitative), that is, in self-development.

Hegel regards the process of dialectical development as a process of self-denial, self-determination and self-development. It is for this reason that Hegel regards ideas as infinite, absolute, free and independent. These are actually the same thing.

My understanding is that everything develops in the negation of negation and is endless.