"Hegel certainly did rule out any criterion of truth, by considering what is true as interior to its process, but he restored the credentials of the Truth as Telos within the process itself, since each moment is only ever the "truth of" the moment which precedes it. When, in a provocative formula which took up Lenin's words ("Marx's doctrine is all-powerful because it is true") directed against the dominant pragmatism and every (idealist) idea of Jurisdiction, I "defined" knowledge as "production" and affirmed the interiority of the forms of scientificity to "theoretical practice", I based myself on Spinoza: not in order to provide The answer, but to counter the dominant idealism and, via Spinoza, to open a road where materialism might, if it runs the risk, find something other than words. It is understandable that, behind these reasonings, we found other theses in Spinoza which supported them, and that we put these to use too, even at the cost of overdoing things. Spinoza helped us to see that the concepts Subject/Goal constitute the "mystifying side" of the Hegelian dialectic: but is it enough to get rid of them in order to introduce the materialist dialectic of Marxism, by a simple process of subtraction and inversion? That is not at all sure, because, freed of these fetters, the new dialectic can revolve endlessly in the void of idealism, unless it is rooted in new forms, unknown to Hegel, and which can confer on it the status of materialism."