Delirium and hallucination are secondary in relation to the really primary emotion, which in the beginning only experiences intensities, becomings, transitions. Where do these pure intensities come from? They come from the two preceding forces, repulsion and attraction, and from the opposition of these two forces. It must not be thought that the intensities themselves are in opposition to one another, arriving at a state of balance around a neutral state. […] In a word, the opposition of the forces of attraction and repulsion as produces an open series of intensive elements, all of them positive, that are never an expression of the final equilibrium of a system, but consist, rather, of an unlimited number of stationary, metastable states through which a subject passes.
Deleuze and Guattari, Anti-Oedipus, “1. The Desiring-Machines”, 18-9