How about a philosophical view of unity of opposites

It is the view of contradiction. The relationship between things that exist in both opposition and unity is contradiction. Contradiction is the category of relationship.

The two conflicting sides have both struggle and unity. Struggle is absolute and unity is conditional.

Contradictory identity, that is, unity, interdependence, mutual conditions, I have you, you have me, such as "you" and "I" is unity, without the concept of "you" does not matter the concept of "I", there is no "long", there is no "short", that is to say, the two are "unity".

Contradictory struggle, that is, opposites, separate from each other, mutually exclusive, under certain conditions, transformation. Such as "long" and "short" is the opposite concept they are mutually exclusive, is a pair of contradictions, but if the "short" things added to the long enough, "short" becomes long, that is, a certain condition of transformation.