Each stratum, or articulation, consists of coded milieus and formed substances. Forms and substances, codes and milieus are not really distinct. They are the abstract components of every articulation. [TP: 501]
Substances are nothing other than formed matters. Forms imply a code, modes of coding and decoding. Substances as formed matters refer to territorialities and degrees of territorialization and deterritorialization. But each articulation has a code and a territorality; therefore each possesses both form and substance. [TP: 41]
[T]here is no real distinction between form and substance, only a mental or modal distinction: since substances are nothing other than formed matters, formless substances are inconceivable, although it is possible in certain instances to conceive of substanceless forms. [TP: 44]
Forms relate to codes and processes of coding and decoding in the parastrata; substances, being formed matters, relate to territorialities and movements of deterritorialization and reterritorialization on the epistrata. In truth, the epistrata are just as inseparable from the movements that consitute them as the parastrata are from their processes. [TP: 53]