Is humanity just a characteristic?

There's humanity as the body of humans and humanity as a characteristic, and there is characteristic as some specific abstract feature and characteristic as in "being characteristic of..." which is more general.  For both words the one definition paradoxically kills the other and holds it existent. This duality is the very existence of things. One ideally can't but see the dual system once one got to the thing. Everything as a flow of relations of contraries; what else could have made it move in the first place? Everything works towards contraries, ceasessly trying to assimilate eachother, probably in search of a gain which never gets to come into existence before becoming one new member of another dual system.