Let me draw a parallel, temporarily at least, between Lacan’s three registers (the imaginary, the symbolic, and the real) and the tripartite structure Deleuze and Guattari identify as the basis for the emergence and understanding of a subject: hallucination, delirium, and intensity.
The correspondences imaginary/hallucination, symbolic/delirium, and real/intensity identify the last of the couplets as the logical priority without which the other two would be impossible. Lacan and Deleuze and Guattari would agree on this point. They would, however, part company on the status of thought and the logic it betrays.
The symbolic for Lacan is immutable. One is born into certain linguistic structures over which one has very little if any control. Rather than the resolution, taming, or expansion of unconscious thought processes, the analytic task for Lacan consists in giving such processes expression, in articulating their truth and making them subject in and of such structures.
In foregoing the structural distinction between conscious and unconscious—“it,” after all, is at work everywhere—Deleuze and Guattari disentangle amongst the various expressions of delirium, of the “I think,” and hence of the symbolic, the schizophrenic from the social. Whereas the Lacanian symbolic, its quality, and the fact of its presence or absence, is beyond modification, Deleuzo-Guattarian delirium is indeed subject to transformation-fetishisation: reversal, exclusivity, and ossification.
It is worth noting here that schizophrenic delirium is not simply the counter-part or specular image of social delirium since its productive quality lies not so much in a Law that will install and ground an identity, but in a process that will lead to (se rabattre sur) and produce a subject and a meaning that are residual, aleatory.
One of the many implications to this distinction reflects on the practice of a symbolic community. In the one case, it is a given; in the other it is produced. In the one case, it is the limit that safeguards its members from the threat of psychosis; in the other, it is the porous boundary through which much is trafficked and produced.