In the opening chapter "Desiring Machines" of Deleuze and Guattari's Anti-Oedipus (the first volume of Capitalism & Schizophrenia) the authors write:
It is at work everywhere, functioning smoothly at times, at other times in fits and starts. It breathes, it heats, it eats... What a mistake to have ever said the id. Everywhere it is machines-real ones, not figurative ones: machines driving other machines, machines being driven by other machines, with all the necessary couplings and connections.
In the introduction Mark Seem writes:
[I]t would be an error to view Anti-Oedipus as yet another attempt at a Freud/Marx synthesis. For such an attempt always treats political economy (the flows of capital and interest) and the economy of the libido (the flows of desire) as two separate economies
As a preliminary reading of this passage should I take it that it is machines that form the psyche? (Is the id made concrete as machines?)