二而一

Explanation: An evolution of the two, two synthetic one. Means the same thing can be transformed into a confrontation between the two phenomena, the two opposing phenomena can be found in the same source 　　Usage: As object, attribute; for things 　　Source: Feng, "My Life" Chapter 30: "I said: 'This is a two and one of the things are not contradictory.'" Thesaurus:  1 and 2