First, every concept relates back to other concepts.Secondly, what is distinctive about the concept is that it renders components inseparable within itself.
Third, each concept will therefore be considered as the point of coincidence, condensation, or accumulation of its own components.
In the concept there are only ordinate relationships, not relationships of comprehension or extension, and the concept's components are neither constants nor variables, but pure and simple variants ordered according to their neighborhood.
(Gilles Deleuze, What is Philosophy?)
